A boy learns why it is better to turn the tap off while brushing his teeth.
The friends go on a tree trail in a bid to discover why monkeys eat bananas.
The scientist performs experiments to find out why humans cannot fly like birds.
A boy visits a landfill site to learn where rubbish goes when it is taken away by bin men. Nina...
Nina takes Molly and her sister to an aquarium to carry out some experiments.
Alyx discovers a way to stop her bread going mouldy, and is shown by Nina how bad the problem...
The friends carry out a series of experiments to discover why they have slugs in the garden.
The scientist experiments and finds ways to make a tent warmer, helped by Felix and the other...
The scientist helps a girl and her friend discover why humans need to eat.
Shauney, Nina, Luke and the other neurons learn about trees.