An introductory episode explaining how ChaCha comes back as Randy's toy car after passing away in a car accident trying to save Randy. This episode gives a quick introduction to the main characters of the show.

After looking at all the clouds in the sky that look like animals, Randy gets the urge to fly, just as every child does. He wants to go visit the "Zoo of the Clouds" Randy and ChaCha think of many ways, but they fail at every attempt. ChaCha decides to call all the birds to help them fly, and off they go into the sky.

Dad tells Randy a scary story about a ghost that is rumored to live in a Ghost apartment. Randy starts crying, but ChaCha gets all excited about meeting the Ghost. So he takes Randy for a late night drive to the apartment where they meet an old lady. When they head home, a ghost appears and tries to return Randy's pillow that he left behind at the apartment. After a long chase around the city, Randy, ChaCha and Sara the ghost become close friends.

Randy notices a post card in the mailbox with a picture of a big ship. Naturally, he wants to go see the ship. ChaCha takes Randy on an under-water adventure where Randy learns about marine life. After being chased by a shark, they jump onto the ship, which is headed back to their hometown, Greenhill Town.

On Mom and Dad's anniversary, they ask Catherine to babysit Randy. While Mom and Dad are gone, Catherine invites some friends over for a party. Accidentally, a vase is broken. This vase happens to be Dad's anniversary gift to Mom. Randy feels responsible and runs out of the house. After spending a few hours outside, he meets Mary at a bus stop. Mary says she ran away from home since her Mom and Dad were always fighting, but that they would come looking for her. When they don't turn up, Randy sees Mary crying for the first time. However, Randy's Mom and Dad come looking for him and they tell him that he is their most precious gift. Just then, Mary's parents turn up.

Mom is down with a bad flu, so Dad leaves for work telling Randy to take good care of his mother. Mom decides to go to the supermarket to get some things for the house. Despite Randy's efforts to stop her, she takes off, and Randy decides to follow her secretly with ChaCha. Randy's mind is filled with all kinds of anxieties. He thinks her car would either crash into a wall, fall into a hole or even fall into the ocean. Randy follows her into the supermarket, but gets lost in the maze. After running around with Nick and Terry, he finds his mother and lets her know that he had come to help her.

Randy draws a picture of Grandma who lives in Cleverland, but decides to take it to her rather than posting it. On their way, they are chased by a big truck. They learn that it is actually a hippopotamus that had turned into a truck, and it was lonely. Randy and ChaCha become his friend. All this takes up so much time, and they finally decide to mail the drawing to Grandma.

Mom puts many different costumes on Randy for the city masquerade carnival. Randy decides for the first time to say NO to Mom and makes his own decision. He paints ChaCha to make it look like a racing car, and he himself dresses up as a racer. During the carnival, Randy stumbles over some people and creates havoc. He decides to hide away and regrets making his own decision, but Sara and ChaCha teach him that it is important to stick to one's own decision.

Randy finds a box full of bones at home. He later finds out from his journalist father that bones from every meat shop were mysteriously disappearing. Randy suspects ChaCha. ChaCha is almost certain it is his old friend Bull stealing the bones. They try looking for Bull but learn that Bull had just past away. Bull appears in front of them as a ghost and tells ChaCha that the bones were gifts. Bull explains that he loved playing with ChaCha everyday, but got jealous ever since ChaCha started spending time with newborn Randy. Sara recommends that Bull turn into a toy as ChaCha did, but Bull decides to remain a ghost and live with Sara.

Mary's parents ask Randy's Mom and Dad to take care of Mary for a few days while they are gone. Mary does not have any appetite and is depressed all day thinking that her parents had a fight and went away. Randy tells his mother that Mary needs to see a doctor, but Mom tells him that Mary has these black clouds in her heart and a doctor cannot get rid of it. ChaCha traces Mary's parent's smell to the hospital. Mary jumps for joy when she finds out that her mother was expecting a baby.

Dad buys a new toy robot to add to his toy collection. Bull decides to turn into that robot but does not want them to find out, but it is not possible to hide it. While Bull is running around in the city, he is chased by children who have been wanting this toy robot. This one talks, so they really want it badly. Randy, ChaCha and Sara help Bull get away. Bull decides that he needs more training and he hops on to a bus going, who knows where.

Randy and ChaCha are relaxing in the park when Randy feels a strong wind. He asks ChaCha where wind comes from and where it goes, but ChaCha can only give a scientific explanation which Randy obviously does not understand. So he tries to follow the wind and is surprised to hear music. A cellist was practicing for a music contest but Randy thinks it is the wind singing. ChaCha tells Randy that maybe it is a song by the Wind Fairies. At the music concert, the cellist plays the Wind Fairies' song. As he starts to hum along, everybody in the audience does, and the evening ends on a high note. Randy and ChaCha have reached their conclusion. Winds go to where there is a lot of fun and excitement, just like the both of them do.

Catherine decides to take Randy up the river to look at some Salmon. For the first time, Randy experiences the magnificent miracles of nature. He sees salmon making endless efforts to swim up the river to lay their eggs. ChaCha explains that some salmon cannot make it all the way and that was the way nature was. Randy feels sorry for the ones that cannot swim up, even though the weak ones are trying as hard as the strong ones. ChaCha is moved by Randy's thoughtfulness and decides to call Hippotruck to help them carry the weak salmon up the river.

ChaCha is in love. He is in love with Kana, a cocker spaniel he met in the park. Randy thinks ChaCha is sick. ChaCha explains that he tried to communicate with Kana but that she was frightened by a talking toy car. Randy and Bull help ChaCha convey to her that ChaCha is a warm-hearted dog that is just trying to be friends with her.

Randy welcomes his baby cousin home and enjoys taking care of him. But the baby makes a big mess in Randy's room. Randy also notices that Mom and Dad keep holding the baby and are not looking after Randy. For the first time, Randy feels uneasy in his heart. When he finally sees the baby cousin ride ChaCha, Randy runs out of the house. ChaCha chases after him to explain that little children want everything. Dad explains that this is a natural feeling called jealousy, and that Mom and Dad will always be his only Mom and Dad.

Forest's old friend and soccer superstar, Grahken, returns to his hometown Greenhill Town for a holiday. Apparently, he wants to take time off to think about retiring from soccer. Forest tries to interview him, but Grahken doesn't notice him. Forest tells Randy about how sad he felt when he wasn't notice by his best friend, and so Randy goes on his hunt for his Dad's old treasure box which was buried somewhere years ago. Randy hopes that the what he finds in this treasure box will remind Grahken of his old days with Forest.

Mom, Dad and Randy visit Grandma in Cleverland, but Randy forgets to take ChaCha along. ChaCha is sitting bored and lonely at home when Bull comes to visit. ChaCha decides to catch up with Randy. After many little adventures, ChaCha and Bull reach Cleverland. Meanwhile, Randy has been feeling homesick, or ChaCha-sick rather, so Grandma gives Randy a little toy car that his father use to play with. When Randy is left alone with the toy, the toy starts to hop around and croak. BuBu Pyoko was a frog that chose to become a toy car. Pyoko loved to sing to Grandma from the garden when he was a frog. Pyoko noticed that Grandma took good care of the toy car, so Pyoko decided to become the toy car in order to always stay close to Grandma.

Later, Randy introduces ChaCha and Bull to Pyoko and a new friendship begins. Meanwhile, Dad tries to convince Grandma to come live with them in Greenhill Town, but Randy tells Dad that if she left Cleverland, all her friends would be sad. Randy really meant Pyoko, her garden, the trees and all of Grandma's friends.

Nature plays a trick and Greenhill Town is filled with snow. It happens because of two tiny aliens that come to earth. One has come to look for the other who disappeared in Randy's house. Randy, ChaCha and Sara help find the other one, who was hiding in Dad's nose.

Nick and Terry come to borrow ChaCha. Of course, Randy will never lend his best friend to anybody, but Dad teaches Randy the importance of sharing with others. Randy agrees to lend ChaCha, but everyday is miserable without ChaCha. One day he realizes that Nick and Terry borrowed ChaCha in order to compete and win the Kids' Toy Car Grand Prix. He asks them to return ChaCha, but they lend him their toy car instead. Sara offers to help Randy win the race. One day, Nick and Terry notice Randy speeding away in their car. They had always thought their car was slower than ChaCha, but they were not aware of Sara's help. Before the race begins, they ask Randy to return their car. Randy agrees under the condition that they take good care of their toys.