Capsela
Capsela is a construction toy consisting primarily of spherical plastic capsules which may be connected to form various toys that can be static or moving and suitable for land or water. The capsules usually have six hollow hexagon connectors pointing out, where a hexagon sleeve piece bridges between two capsules. The hollow connection pegs on a capsule can have have electrical or rotary adapters inside, reaching into the next capsule. There are electric motor capsules, gear capsules, switch capsules, pontoon capsules, and others; there are also battery holders, wheels, propellers, impellers, lights, wires, and other miscellaneous supporting pieces.
Capsela products were originally manufactured by Mitsubishi Pencil Co of Japan. The series was then licensed out to Play Jour and has since been produced by VTech, Kidology and a number of other subsidiaries. The range seems to have been recently re-released in Japan by Bandai, adding new colours to the basic range of transparent spheres. They are frequently used in TLC classes (Technology Life Career).
-Source http://en.wikipedia.org/wiki/Capsela -