Joseph and his team need to make a machine that will feed Alyssa's elderly cat while her dog is out of the house. There's one problem: cats can't open fridge doors!

A.J. loves being outdoors but hates having sunscreen rubbed on his back. Joseph and his team need to make a machine to do the job!

Find out how to make a sunhat machine.

April's lunch keeps getting taken by a schoolyard bully. Joseph and his team plan to build the smallest, most explosive machine they've ever created, in order to distract the bully before they realise they've been pranked.

Want to prank someone with a lunchbox trap? Here's how to do it.

Ava wants her family to do more to help stop climate change. Specifically, she thinks they can start taking shorter showers and stop making unnecessarily short car trips - Joseph and his team have a few surprising ideas.