We all know the Body Brothers like to dance, they like to move, but they also like to learn about new things. They found out about parts of the body, animals and now it's time to look at inventions.
The lads sometimes need some help finding out how all our everyday gadgets actually work - step forward Auntie B. She is an amazing inventor and has lots of cool stuff to help answer all their questions.
Watch the full show about the Vacuum Cleaner up top and stream the full box set on RTÉ Player!
And, as you all know, no Body Brothers show is complete without some signing and dancing...like the Bike Song...