Carrick is building a hot air balloon and asks ‘How do hot air balloons stay up in the sky?’ The friends meet Muldoon the hot air balloon who tells them that the hot air in his balloon makes the balloon rise into the sky and keeps them there.
Brewster and Maggie are at Ginger’s Shadow Show. She wonders ‘What are shadows made of?’ Brewster takes them to meet Atom Adam who explains to the friends that shadows are made when something blocks the light from shining.
Helvetica Frog is teaching Brewster and Maggie a new dance. She notices a rainbow and asks ‘why aren’t raindrops different colours?’ They meet Drippy who shows them that when the sun shines through the raindrops they make the rainbow colours.
Brewster, Maggie and Hamish are making onion soup and Hamish’s eyes water. He wonders ‘Why do onions make our eyes water?’ The friends meet Soup Dragon who explains the onion juice sprays into the air, wafts upwards and make our eyes water.