Messy accidentally drops his superstacked jam sandwich, but why did it fall down and not up? He goes to OKIDO and rockets up to the moon to find out.

Messy hears a bird singing outside but doesn't know what he's trying to say. Maybe he'll find the answer in OKIDO.

The sky is full of big grey rain clouds in the real world. Messy watches his sandcastle outside get washed away by the pouring rain. Why does it have to rain? He competes in the OKIDO flower competition and finds out why.

Messy wonders why his tasty green socks don't taste the same when he has a cold

Messy, Zoe and Felix travel to the land of balloons.

Why do some things float and some things sink? Pirate Captain Messy will find out in OKIDO.

Messy is having fun blowing loud notes through his musical horn instrument "PARP PARP!!" But whatever noise Messy is making someone or something is making it too. Messy goes in search of the copycat voice.

Why do we need to brush our teeth? When you need to now go to OKIDO.

Messy finds out about rainbows.

Messy wants to know where his caterpillar friends went.

Messy monster can't work out why his cart won't move. The wheels just won't go round like normal. Off he goes to OKIDO to find out why.

Messy monster is just about to take a bite out of his delicious green sock for breakfast but before he can... WHOOOSH! His sock has blown away! He goes to OKIDO to find out why the wind is so blowy!

Messy finds a very dusty sock underneath his bed but why does it make him teary? He goes to OKIDO to find out.

Messy wants to know how his goldfish friend can stay underwater for so long? He goes to OKIDO to find out.

Messy has a pair of yummy green socks waiting for him. He eats one but where is the second? In OKIDO he finds out.

Messy monster is having breakfast and sees little objects on the fridge, why don't they fall off? He goes to OKIDO to find out.

Messy's new friend is in a spot of hot bother. They go on an icy adventure to the south pole, the desert and mountains to help.

Messy can't wait for Christmas Day to arrive. He learns that everyone needs to get a good night's sleep, even Mother Christmas.

Messy joins his friends in OKIDO on a tiny adventure. They explore the electrical world of circuits to fix Zoe's communicator.

Hey, who turned out the lights? Messy goes to OKIDO and finds out electricity can lead to music, lights and disco dancing.

Messy and friends rocket into space but a mischievous Messy sends OKIDO's seasons into chaos. Time to fix this planet wobble.

Aliens on OKIDO telly? Skateboarders in the satellite?. Everything's upside down. It's up to Messy and his friends to fix it.

Messy has to save OKIDO from a falling comet before his bedtime. He sees that Mayor Oki still has his bath.

There's some funny 'buzzy-ness' going on in OKIDO. Where are all the bees? Messy and friends meet bee royalty and save the day.

Messy joins Zim and his friends on a mission inside a sandwich to photograph some atoms for Mayor Oki – Everyone say cheese.