Abstract: A martial arts training apparatus includes an adjustable length pole to be supported between a ceiling and a floor in a generally vertical orientation. A plurality of rotatable collars are provided on the pole. Arms extend from the collars and are free to rotate in opposite directions around the pole when struck to provide targets for striking and to mimic an opponent's limbs to be blocked or dodged. A static strike target may be provided on the pole. The apparatus can be configured to support a double end speed bag from one of the arms such that the double end speed bag moves in a dynamic unpredictable manner when struck. A support arm may be provided to connect the top arm to a lower collar to provide additional support of the double end speed bag.

Abstract: A system for joining together pieces of cardboard is well-suited for use by children as a toy, or for more useful purposes such as joining cardboard to make useful structures such as furniture. The system includes various fasteners, connectors and supports that can be used to join pieces of cardboard without the need for tools such as drills, screwdrivers, wrenches, hammers, or the like. The system permits great flexibility in joining cardboard together such that it might be used to create sculptures or whimsical structures of a user's imagination, recreational structures like play forts or playhouses, or more useful items like furniture. Additional connectors may include ball and socket connectors and an extender that permits use with thicker and more sheets of cardboard.

Abstract: A system for joining together pieces of cardboard is well-suited for use by children as a toy, or for more useful purposes such as joining cardboard to make useful structures such as furniture. The system includes various fasteners, connectors and supports that can be used to join pieces of cardboard without the need for tools such as drills, screwdrivers, wrenches, hammers, or the like. The system permits great flexibility in joining cardboard together such that it might be used to create sculptures or whimsical structures of a user's imagination, recreational structures like play forts or play houses, or more useful items like furniture.

Abstract: A martial arts training apparatus includes an adjustable length pole to be supported between a ceiling and a floor in a generally vertical orientation. A plurality of rotatable collars are provided on the pole. Arms extend from the collars and are free to rotate in opposite directions around the pole when struck to provide targets for striking and to mimic an opponent's limbs to be blocked or dodged. A static strike target may be provided on the pole. The apparatus can be configured to support a double end speed bag from one of the arms such that the double end speed bag moves in a dynamic unpredictable manner when struck. A support arm may be provided to connect the top arm to a lower collar to provide additional support of the double end speed bag.