What adults often take for granted in life's minutiae frequently delights children. For six year old Luna, the earth is a giant laboratory for her to explore with her little brother, Jupiter, and her pet ferret, Clive.
Luna's family are visiting a coastal town in Japan. When their friend finds a rare pearl in an oyster, it gets them wondering, how do pearls get inside oysters? (S5, ep 1)
After talking to Grandma and Grandpa on the phone, the trio get to wondering, how do telephones work? (S5, ep 2)
On their way to the beach, Luna's family cross a bridge and notice several crabs eating leaves. But when they return, the crabs aren't there! Where could they be? (S5, ep 3)
When Luna's family discover the region of Bonito in Brazil with their friend Alice, they decide to investigate where the water from the river comes from. (S5, ep 4)
Luna's family are visiting the Dead Sea. When they all get in the water, they discover that it's incredibly easy to float. But why? (S5, ep 5)
Luna, Jupiter and Clyde are in Hawaii with their friend Iolana, when they notice ants heading into the camper. But why do the ants walk in a line? (S5, ep 6)
As Luna's family help Grandma plant her new tomatoes, they are surprised to find lots of little worms wiggling around in the dirt - and Grandma wants them there! (S5, ep 7)
During a trip to the Caribbean, Luna, Jupiter and Clyde notice that some islands seem to float. Could that be so? The trio look for an answer! (S5, ep 8)
When Luna and her family visit the Leaning Tower of Pisa, the trio are surprised to see the building really is leaning. How does it not fall over? (S5, ep 9)
Luna's friends, the twins, tell the trio about their great-grandparents from India who used to make a perfume that smelled like rain! But how? (S5, ep 10)
While picnicking in a park in Santiago, Luna's family spot a pretty little hummingbird flying around - backwards! The trio start to investigate. (S5, ep 11)
Luna and her family are on a beach in France. When Jupiter starts to get a sunburn, it gets Luna wondering, how does sunblock protect us from the sun? (S5, ep 12)
Luna's family are watching an airshow with some friends. When they notice the fighter jets flying in a 'V' formation, they begin to wonder why. (S5, ep 13)
Luna and her family are visiting a reserve in China. The trio notice that the pandas all seem to have spots in the same places. Why do they look so alike? (S5, ep 14)
While visiting a humanitarian centre in Jamaica, the trio discover how they prepare for hurricanes. The kids are curious and devise an experiment! (S5, ep 15)
After falling off her bike, Luna comes back from the doctor with her arm in a cast. But Jupiter and Clyde just have to make sure that the cast will really work! (S5, ep 16)
When Grandpa wants to get a better look at a photo, he takes his glasses off - but Grandma has to put hers on! It gets Luna wondering, how do glasses work? (S5, ep 18)
Luna's family are visiting a farm in Germany. When their friend takes the leftover food scraps to compost to make the plants happy, the trio decide to find out more. (S5, ep 17)
While Luna and her family are on a boat in Portugal, Clyde sees an octopus fit through a very small hole. How could that be possible? (S5, ep 19)
Luna and her family are in Argentina, where there is going to be an eclipse! After her parents share a few stories, Luna decides to find out more. (S5, ep 20)
When Luna's family visit the Great Wall of China, they are amazed to see just how big it really is. Can you really see it from outer space? (S5, ep 21)
Luna's family are riding their bikes down a pretty canal in Amsterdam, when the kids see boats with houses on them! Houses are so heavy, won't the boats sink? (S5, ep 22)