To constitute a connector and a mover in a way that blocks can smoothly be folded, as well as to reduce the number of parts by one to lower the cost.

This toy is provided with a plastic-made axial member 11 to be extended into the inside spaces 5a, 5b of both blocks 1a, 1b, penetrating through both notches 4, 4 of the blocks 1a, 1b to be connected; a connector 12 fixed to the tip of the axial member 11 and formed into a spherical surface shape, whose contact surface side gets a contact with the inside wall surface at the notch 4 side of the one block 1a; a semispherical mover 13 engage- inserted in a free moving way toward the axial direction of the axial member 11 and formed into a spherical surface shape, whose contact surface side gets a contact with the inside wall surface at the notch 4 side of the other block 1b; and a plastic-made plate spring 14 unified/connected to the base end of the axial member 11 and positioned in the inside space 5b of the other block 1b, whose tip is connected to the mover 13 and whose plane surface to force- move the mover 13 toward the connector 12 side is formed into a nearly C- shape.