Abstract: The present invention relates to flat pieces, preferably disks or chips of circular shape fabricated, of flexible plastic material, that have a series of slots or notches alongside their circumferential edges. One of these slots is bigger in size and of different configuration, which configuration makes possible the launching a first piece into the air with the help of a second piece which is used as a propeller. In addition, the small slots are used to create a great variety of structures or sets, by inserting a small slot of a first disk in a small slot of a second disk, and so on. The planar faces of the disks may be used to imprint any legend or drawing.