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[Learning By Playing]: The robot kit is composed of multiple parts, which can be DIY design and programming,You can set a moving route for a specific racing track, Also can cultivate kids thinking and practical ability; [Smarter Upgrade Design]: 3-in-1 design,The science kits for kids age 8-12 combines water bomb guns, turrets, and armored vehicles brings more interesting experience,best birthday gifts for 8 9 10 11 12 13 14 years old boy girl! VANLINNY product uses special wheels, it is not only moving and 360° Rotating, but also Drifting; equipped with battery and remote control, USB charging cable,2000 water bombs(water bombs need to be soaked for 4 hours,size:7-8mm);