Great Gizmos Dam - 4M - 5603246 - Construction set - Kidzlabs - Spy Science / Alarm - Minimum Age: 8 years Requires batteries: No Product description: 4M KidzLabs: Spy Science / Alarm, contains a plastic platform, plastic accessories and metal pegs, electric buzzer, electric wire and detailed instructions, box 17x22x6cm, batteries not included, 8 +., Publisher: 4M