The Hideout

Fatty and George get the key to their grandfather's old boatshed and together with Izzy, clean up the place so it can serve as their new hideout where they can work on building a new time-machine from their father's plans. An encounter with a pair of bank robbers reveals the crystal's ability to turn back time. Their reward for catching the crooks earns the kids a reward which they use to purchase parts for the time-machine.