Learning aid consisting of two parts folded together - with question written on outside and answer written on inside

摘要

The learning aid in the form of a toy, is made of flexible material and consists of two discs which are connected by a flexible hinge. The discs can be folded one over the other with a projection (a) on one disc engaging a hole (b) in the other disc so that the two discs are held in the folded position. The toy can be used for question and answer form of instruction. The question is written on the outside surfaces of the folded discs with the answer being written on the inside surfaces. USE - Learning aid.