Great Gizmos Dam - 4M - 5603226 - Construction set - Kidzlabs - Kaleidoscope Making Kit - Minimum age: 7 years Requires batteries: No Product description: 4M Kidzlabs: Kaleidoscope Making Kit with materials included or own imagination, Box 17x22x6cm, 7 +. Educational values: Imagine, invent, create, Publisher: 4M