Abstract: The present invention includes a set of stacking blocks designed to resemble the Arabic numerals 1-10. Each number block is height proportional to its value, and they can be stacked vertically. This feature allows students to see the relationship between numbers, and discover math concepts as they stack or play.

Abstract: A tool, for teaching and learning multiplication includes two strips. The first strip has numbers set down in sequence from left to right in order of increasing value with each subsequent number increasing in value by adding the first number to the immediately preceding number in the sequence. The second strip is a filter, which when overlain on the first strip blocks out a repeating fixed quantity of the numbers to leave a visible second sequence such that any visible number in the visible second sequence is a fixed number additive to an immediately preceding blocked-out number. This arrangement means that any selected number in the visible second sequence is the product of the filter number times a counted position from the left of the selected number. The tool is preferably assembled so that there are numerous strips in a set that have a pivotal connection.

Abstract: A pivotally manipulable toy is disclosed which includes a plurality of sections pivotally coupled in series, with a plurality of counting apertures being located in a plurality of the sections. The pivotally manipulable toy can be manipulated to form a plurality of shapes including letters and numbers. The pivotally manipulable toy may be used in a manner that is both educational and enjoyable for children. Further, a manual which correlates each of the shapes with the number of unobstructed counting apertures that are visible when each shape is formed correctly may be provided together with the pivotally manipulable toy.

Abstract: An electronic toy appliance for use with interchangeable graspable objects such as blocks or tiles, the toy appliance designed to stimulate the development of a child's mind using audio feedback.

Abstract: An electronic toy designed to stimulate the development of a child's mind using audio feedback, the toy comprising an object having a plurality of sides, the object adapted for lateral movement and rotational manipulation by a child on a substantially horizontal surface so that the child can laterally move the object on the substantially horizontal surface and select different sides of the object to face upwardly.

Abstract: The crystal structures of CD45 and LAR, described herein, provide a basis for kinetic and functional studies. Identification of the crystal structures of cellular molecules is important in to determine functional roles in immunity, phosphorylation events, disease initiation mechanism.

Abstract: An article of clothing such as a bib, T-shirt, pants, dress, pajamas, etc. for a baby, toddler, or child having one or more inverted items, for example characters, numbers, diagrams, pictures, letters, designs, figures, or combinations thereof, on the front of the article so that, they appear right-side-up to the infant or toddler wearing the article and up-side-down to the adult or care giver. Such an article can be used to teach a child numbers, letters, pictures, the alphabet, numerical system, and the like while a child is wearing the article. It is believed that by putting the items in the proper orientation for right-side-up viewing by the child, the child may learn more quickly and not be confused when these items are shown right-side-up on the television and in reading materials.

Abstract: The present invention involves the use of numerical digits with markers and attribute tags as a means to represent quantities, facilitate mathematical manipulation, and solve problems. The given number of markers on each digit corresponds to the value of the digit. For example, the digit three is enhanced with three markers. The attribute tags are also provided with a given number of markers, for example, ten, for math problems in base ten. The digits and the attribute tags are then used to represent and solve math problems including, but not limited to, learning ones, tens, hundreds, thousands columns, addition, multiplication, subtraction, and division, of whole numbers, of fractions, of negative whole numbers and of negative fractions, as well as decimals and exponents. The problems are quantitatively viewed, manipulated, and solved directly on the numerical digits incorporating the markers and attribute tags.

Abstract: An educational system including a set of characters comprising foam numbers, operational symbols, and advanced problem solving activities each of which includes touch sensitive fasteners which can be applied to a collapsible, touch sensitive board. The set of math manipulatives permits a student to carry out all pre-algebraic calculations upon a vertical surface by using the touch fasteners to fasten the characters onto the collapsible touch sensitive board.

Abstract: An article of clothing such as a bib, T-shirt, pants, dress, pajamas, etc. for a baby, toddler, or child having one or more inverted items, for example characters, numbers, diagrams, pictures, letters, designs, figures, or combinations thereof, on the front of the article so that, they appear right-side-up to the infant or toddler wearing the article and up-side-down to the adult or care giver. Such an article can be used to teach a child numbers, letters, pictures, the alphabet, numerical system, and the like while a child is wearing the article. It is believed that by putting the items in the proper orientation for right-side-up viewing by the child, the child may learn more quickly and not be confused when these items are shown right-side-up on the television and in reading materials.

Abstract: An educational kit for instilling in children a positive self-image at an early age. The kit (known as "ALPHA BLOCKS") teaches young children the complete alphabet and numeral system in a way that is fun, captivating, hands-on and helps them acquire understanding of divergent shapes and colors. The kit includes alphanumeric symbols ranging from the letters of the alphabet to numerals 0 to 9. The symbols are separable into dual sections via a dovetail and groove connection. The dovetail and groove connection ensures a strong and study attachment that permits easy separation of the symbols by the children. Each symbol has a unique color that helps distinguish it from the other symbols. This assists the children in assembling the symbols and also helps them develop the ability to distinguish colors. Included also in the kit is a receptacle useful in storing the complete set of alphanumeric symbols and displays each individual symbol (with its appropriate color) in both an attached and detached arrangement.

Abstract: Apparatus for teaching the addition and subtraction of whole numbers through the use of objects comprising a sheet with three containers across in a row, the containers of the row being separated by a mathematical sign (+ or -), and the second and third containers being separated by an equals sign (=); and a plurality of objects, the objects being of a similar shape but with distinctive markings thereon; whereby when some of the devices are placed in the first container and others in the second container, the third container may be filled by the child with the objects representing the result of the mathematical process to be performed.

Abstract: A puzzle for teaching the sequence of a series of elements as number or letters. The elements, in their characteristic outline shapes, are fitted overlapping in sequence into correspondingly shaped pockets in a board. A following element, seated before the next preceding element, blocks the preceding element from being seated.

Abstract: A toy adapted to instruct young children by association. The toy teaches proper numeric, alphabetic, or color sequences and the standard left to right reading convention, by utilizing blocks that are inserted into shafts in a stand. Blocks inserted out of proper sequence will fall through the stand but passage of blocks inserted in the proper sequence will be obstructed and those blocks will not fall through but will remain supported within the stand.

Abstract: An activity center includes a plurality of polygonal frames pivotally connected together. Each frame includes an open area accessible from each side thereof and an activity device mounted therein whereby each device is accessible from either side of its respective frame. At least some of the activity devices are movable with respect to their respective frames. Particular elements of the activity center are interchangeable among the respective activity devices and the devices are generally cooperable with each other, therey enhancing the usefulness of the apparatus.

Abstract: An educational toy based on the use of three-dimensional numerical figures which can be more easily memorized upon their manipulation by a child and which are constructed and arranged to be interconnected to form a three-dimensional representation of a human head having different facial expressions representative of different moods, such as sadness, sorrow, joy, fright, surprise, etc. This toy includes a plurality of three-dimensional numerical figures including the ten different numerical figures forming the arabic numbers and having each a connecting aperture, projection or both to removably interconnect sets of those figures to form different facial expressions.

Abstract: An instructional aid consisting of a plurality of objects useful in teaching and understanding basic concepts of number, addition, subtraction, multiplication and division. Each of the objects in the plurality corresponds to some integer number between one and ten and has a thickness representing the number to which it corresponds. Moreover, each object has a surface having a color or combination of colors representing the prime number or composite number to which it corresponds. The surface having such color or combination of colors has the shape of the Arabic numeral representing the number to which the object corresponds. Alternatively, this surface has the shape of a symmetrical figure with a number of sides equal to the value of the number to which the object corresponds. As a further alternative, this surface consists of a linear composite of unit surfaces, the number of such unit surfaces being equal to the value of the number to which the object corresponds.

Abstract: The present educational amusement device includes a horizontally pivoted balance arm and several pairs of matched game pieces. The game pieces of each pair include one which displays a non-verbal symbol and another one which displays the word for that symbol. The game pieces of each pair are equal in weight to each other but different in weight from the game pieces of every other pair. Therefore, the balance arm will assume a horizontal position only if two game pieces placed on it belong to the same pair. A downwardly extending front wall of the balance arm presents a window which registers with and fully uncovers a smiling face symbol on the pivotal support for the balance arm only when the balance arm is horizontal.