Here is a fun kit that lets you build a metal water rocket launcher. The StratoLauncher IV Water Rocket Launcher has aluminum, plastic, and brass parts. You can use a 2gal tank for up to 30 launches. The StratoLauncher launches bottles over 350ft in the sky.
More gadgets like this: here
You can upgrade the kit to do more with it. Its 125 PSI safety valve prevents exploding water bottles.
**Disclaimer: Our posts may feature aff links. As an Amazon Associate, we earn from qualifying purchases. Please read our disclaimer on how we fund this site.
