Abstract: An educational device for teaching facts to children in a manner that is pleasant to them by incorporating physical activity upon their part; the device including an upstanding large display board having a row of questions and also a row of answers to these questions mounted on a front side, a contact button alongside each question and each answer, the child holding in each hand a contact probe for each selection being contacted to the contact buttons associated with a correct answer to a question, the probes thus closing an electric circuit on a rear side of the panel that includes a low voltage dry cell battery and motor that activates an animated display upon a front side of the board such as a windmill having rotatable wind vanes, so the child sees that he had identified a correct answer to a specific question.

Abstract: An eye drop designed to facilitate dispensing an exact number of drops into the center of an eye.