Abstract: A combination card capable of being assembled into a toy includes a plurality of symmetrical projecting members and recessed grooves provided at proper locations around each of four circumferential edges to engage with those of any other combination card. The combination card has further an insert slot respectively bored at four corners for engaging any other combination card to make up a 3D structure for a toy. The feature is that a plurality of toy assembling members are made by punching in the center portion of each combination card of each combination card to be assembled together with other corresponding toy assembling members. Thus, the combination cards can be assembled with varied modes, and the toy assembling members can be detached from the combination cards and assembled into a 3D structure, having effects of intelligence stimulation and amusement .