Caillou is drumming and singing badly. Mom tells Caillou to quiet down so Rosie can take a nap, but he doesn't want to at first. Eventually he stops and heads off to the kitchen to get some cookies. They're hard to reach though, so he tries to use a stool and ends up spilling the cookies as well as a jar of honey. He tries to make honey cookies, but ends up making a mess. Mom comes in and decides that rather than get upset about it, she'll just have Caillou help her clean up. He does and then he and Mom make cookies together. Sometime at the park, apparently later that day, Caillou and Mom share the cookies with Dad and Rosie. Then Caillou runs off and starts covering himself with mud. Dad asks him what he's making and he answers "a big mess."

Caillou is afraid of Mr. Hinkle, and when Mr. Hinkle waved to Caillou, Caillou panicked and ran. That made Mr. Hinkle really sad, so he goes over and apologizes. Caillou's Mom couldn't get Caillou to go downstairs, so they engage Caillou in a game of "Hide and Seek". In the end, Caillou is no longer afraid of Mr. Hinkle. As a matter of fact, Caillou decides that he likes Mr. Hinkle after all.

Caillou doesn't want to eat vegetables - he wants cookies instead. Then his grandpa comes over, and they go out for a walk. Along the way, his grandpa shows him various animals and their food. Cut back to the house. They're home, and they're as hungry as bears - because they are pretending to be bears. Caillou eats his vegetables, and he's allowed to have some cookies.

Caillou wants to play, but everybody's too busy to play with him. Caillou's Mom has to do the taxes, Caillou's Dad is repairing the washing machine, and Caillou's grandma is tucking Rosie in for her nap. Even Gilbert doesn't seem to want to play. Caillou then goes back into his room and plays with his plush toys.

Caillou's hiding in a pile of plush toys when his mom comes in and calls him to eat chocolate pudding. Now, if it's one thing Caillou really likes, it's chocolate pudding, so he comes out of hiding. On his way downstairs, he's made to tidy up the mess on the stairs. Then, just as he's about to eat the pudding, he's called outside to tidy up the mess he's made on the porch. And then, just as he's back at the table, he's called into the bathroom to tidy up another mess. Finally, he has his chocolate pudding. Caillou's Dad suggests that he do something about all his old toys. Caillou decides to give some to Rosie, and his Dad suggests that they make a toy chest after eating. Scene cuts to when the chest is finished. We see the lid close, and a picture of Caillou's face is on the lid.

Caillou pretends to be a race car driver, not realizing the trouble he's causing.

It's Caillou's first day at daycare, and he's whining because he doesn't want to go - He wants to be at Grandma's instead. We meet with Mrs. Martin, Caillou's teacher. Caillou's mom then leaves. Mrs. Martin gives Caillou some juice. Caillou then tries to befriend Leo, but Leo was rude to him. Enters Clementine. She introduces herself to Caillou, and explains to Caillou that Leo ""doesn't like to share"". She shows Caillou what she has been doing: cutouts. She then asks Caillou why does he prefers his grandparents' place. He tells her that he likes painting. She explains to him that they can do that at daycare, too. She brings out some paints, brushes and paper. Caillou paints a robin as Clementine cuts out some paper worms. Leo walks by, and notices Caillou's painting of a robin. He wants Caillou to teach him how to paint. Caillou aggrees, on the condition that Leo teach Clementine and him how to build castles with blocks. And so, we see Leo paint a (distorted) robin while Caillou and Cl

Caillou dreams that he's a lion tamer and Gilbert is a lion. He then wakes up. He remembers that he is to go to the circus today. He quickly gets dressed. Caillou's dad then comes by the toilet and asks him why he's up so early. Caillou explains that he can't wait to go to the circus. Caillou's dad corrects him - the circus is tomorrow, not today. Naturally, Caillou throws a tantrum. Later, during breakfast, Caillou's dad accidentally grabs hold of burnt toast and starts juggling them. It's then that Caillou gets the idea of playing circus. So they do. Then, Caillou's mom comes downstairs. Caillou's dad asks her if she wants to play the lady that rides the horse. She replies that she'd rather go back to bed. The end.

It's bedtime, but there's a scratchy noise coming from somewhere in the room. Caillou thinks it's a scratchy monster. Caillou's parents thinks that it's the tree branch brushing against the window. But when the scratching noise continues, Caillou gets all delerious in the dark and mistakes his parents for a two-headed monster. The ""scratchy monster"" then appears. It was Gilbert all along, stuck in a paper bag under Caillou's bed! Caillou then learns to use Teddy as an ear-muff. The end.

Caillou complains to his grandma that he has no friends. Caillou's grandma then asks him about Leo and Clementine. Caillou admits that Leo and Clmentine are his friends. Then she reminds Caillou that Rosie may be his sister, but she's his friend, too. And so is Gilbert and Mr. Hinkle. And lastly, so is his Mother and Father and even her - Grandma. The end.

Caillou gets an ear infection and is scared about what might happen.

Caillou meets his baby sister, Rosie. He either likes Rosie or doesn't like Rosie.

Caillou wants to make a snowman, but Caillou's mom wants to take him shopping for ingredients to make a special surprise cake. At the store, Caillou sees a box of cookies, but his mom asks him to put them back. So he does, and they head to the checkout line. However, while waiting at the counter, Caillou suddenly thought of the cookies, and tries to find his way back to the cookies, only to get lost. He breaks down and cries, and it isn't long before his mom finds him. Back home, it turns out that the cake is a snowman cake. The end.

Caillou's reluctant to take a bath at first, fearing such "possibilities" as falling down the drain. He is able to get into the tub, though. In there, he creates quite a mess with the water.

Caillou carries a large stack of clothing into the laundry room where his mom is doing the laundry. He decides to have a little fun and plays dress-up with his dad's clothes. His mom thinks it's funny, so she takes a picture of him together with his dad.

Caillou was playing alone. In walks Rosie. Caillou ignores her, until he notices that she's wearing his favourite Teddy shirt. He throws up a fuss. After a little reasoning with his mom, his mom promised to give Rosie her ""mousie"" shirt, and Caillou gets his shirt back. He puts it on. It doesn't fit him too well (think Britney Spears ;) ). After a while, it starts to itch. He tries using tape to stick the shirt down. No dice. His mom then shows him a pix of him with his shirt, and reasons with him that he's outgrown it. But he's still reluctant to give the shirt to Rosie. Ends up giving shirt to Teddy. The end.

Caillou goes round the block, plays in the sprinklers, plays hopscotch, holds a ladybug and nearly gets lost, but manages to get home with the help of a neighbour.

Caillou is hiding in the cabinet. Whoops! He's stuck. His grandpa helps him out. Then his grandpa shows him a cool hiding place in a tree. Grandpa is too big to fit in, but Caillou is just right. Caillou loves this hiding place and plays with his dinosaurs in it. This is the best hiding place ever.

It's Caillou's birthday, and he's hoping for a particular special dinosaur. His grandma gives him a present. He opens it. It's a t-shirt with a picture of the special dinosaur on it, but no special dinosaur. Caillou's upset by it. The guests arrive, and so the play some games. Then it's time to blow out the candles on the cake. Caillou holds his breath as he makes his wish, then he blows the candles out. Then he has the cake. Caillou's mom then gives him another box. It's the special dinosaur!. Later, Rosie spills ice cream on Caillou's clothes. Caillou then puts on the special dinosaur T-Shirt that grandma gave him.

When Caillou's parents are busy working on the walls and Rosie is sleeping, he decides to play with Gilbert. But Gilbert has a totally different idea of games. Caillou's parents explain this to him, and they are surprised to see two "cats" playing together nicely.

Caillou's parents are going out, and Grandma's coming over to babysit. Later, it's naptime, and he dozes off. Until Glibert comes and wakes him up. Then he has trouble going back to sleep because it's too bright. Grandma comes up with an idea - a cardboard cutout of the night sky, and Caillou eventually falls asleep.

Caillou is playing in the sandbox at the park when he hears a dog bark quite loudly. Frightened by the loud noise, he develops a fear of dogs. His grandma helps him to see that maybe they aren't so bad.

Caillou visits the zoo, sees a rhino and her young, a group of chimps of which one looks like Caillou's grandpa and another looks like Caillou, and a sea otter who's being taught to swim because it lost it's mother. The end.

When Caillou sees it's raining, all he wants to do is jump in puddles.

Caillou's family visit the beach and Caillou has fun paddling and building sandcastles.