Liquifly Aerial Action Each pen will last about

Each pen will last about a year

litmus paper

foam rocket blades

using safe ammonium phosphate crystals

Will suit budding engineers 8+ ready to create some useful tool

Liquifly Aerial Action Each pen will last aboutA standout rocket , the Liquifly uses water pressure to launch a plastic soft drink bottle high, wide and spectacular . The kit supplies the necessary instructions and the valves , launching pad, and tubing. You supply the bottle (eg a coke bottle ) , some water to half fill it, and a bike or foot pump to apply the pressure. Stand back when you launch this thing really goes! (Directed Water pressure is a lot more powerful than the normal directed air