4M Water Rocket Kit, DIY Science Space Stem Toys, For Boys & Girls Ages 8+ New in box! Retails for $21.99 Pump not included. Kit contains 1 plastic bottle, 4 fins (One for spare), 1 fin support, 1 bung, 1 bung connector, 1 pump connector, 1 extension plastic pipe and detailed instruction. Recommended for children ages 14+ Construct your own rocket See how the rocket flies, Blasts over 30 feet Mechanics kits are innovative, inspiring and full of action Kit includes all required parts and instructions Educational kit that demonstrates a science principle