Three friends and their three big imaginary friends have adventures.
After keeping a treat from his mother all to himself, Yuri goes on a pirate adventure and learns that it's more fun to share things with his friends.
Lili's friends help her overcome her fear of heights during a mountain climb to a castle in the sky.
Matt is dead set against trying spinach, but he's left with no choice when he gets caught in a rapidly growing spinach jungle.
Lili learns what forgiveness is all about after her friends put on a circus to make amends for accidentally ruining her face crayons.
Yuri wants to fly his new kite all by himself, but quickly realizes that sometimes you need the help of a few good friends - especially when you're trying to land a plane.
After accidentally chipping a vase, Lili and Nessa have to sneak through their household museum to put it back before her parents find out, but quickly realize that honesty is always the best policy.
Watching his friends have a blast while losing at silly funhouse games, Matt realizes that you don't always have to be the best at something in order to have fun doing it.
Upset at the news of moving away, Lili strands herself on a desert island, where a whale teaches her how to make new friends and a vigorous rescue mission teaches her that her old friends will always be there for her.
Nervous to talk about his artwork in class, Yuri leaps right into his own painting to hide, and winds up working through his fears as he guides his friends through the world he created.
Lili gains a new appreciation for her glasses after she takes them off at her costume party and causes near disaster during her search for a prince.
Yuri is hesitant to learn French, but decides to give it a chance after a fantastical game of hide-and-seek in a place where you can only speak "glerm".
Nervous that a barber won't be able to cut his hair the way he likes it, Matt and Bongo decide to never get their hair cut again and instead become hairy cavemen.
Worried that he's in big trouble, Matt tries to hide a note from his teacher at the end of a rainbow, but his conscience catches up with him and Matt decides to come clean and face the music.
Lili ditches her tea-party-ruining brothers in favor of a grown-up party in her doll house, but as it turns out, a stuffy tea-party is no party at all.
Yuri has trouble with a game that involves improvising a story, but he comes up with a terrific ending after he goes right inside of it, to the Kingdom of Yum.
Upset that her brothers take up all her mother's time, Lili decides to prove how easy it is to look after people by running her own ice cream shoppe, but winds up gaining a new appreciation for the demands of motherhood instead.
Matt's given what he thinks is a small role in the classroom duties, but finds a way to make it a big one after the kids experience some strange weather during a camping trip.
After alienating her friends with too many rules, Lili invents an impossible game of desert croquet, which even she can't play.
Lili takes her friends on a skyward adventure to reclaim her lost poodle balloon, but along the way she learns that sometimes, even when you love something, you have to let it go.
Yuri must summon all of his courage (and his friends) to venture into his basement, eventually learning that there's literally nothing to be afraid of.
Lili shies away from playing so she won't get her new dress dirty, but after spending a day as a forest fairy, she realizes there's nothing wrong with a little dirt.
Yuri digs himself a hole, literally, after he falls off a two-wheel bike on his first try and refuses to get back on, forcing him to try again until he climbs his way to freedom.
After a harrowing adventure through Matt's messy bedroom to find his swim trunks, Matt begins to realize the benefits of tidying up.
Yuri overcomes his dislike of slimy sea creatures after a turtle and a lobster help to free Golias from a ship wreck on the ocean floor.
Lili finds a pretty ring in the sandbox and declares 'finders keepers', but after a trip to a magic palace, Lili finds out what it's like to lose something precious and decides to return the ring to its rightful owner.
After Yuri gives Matt's painting some harsh criticism, he's subjected to a taste of his own medicine by a snarky fridge magnet with peculiar taste.
Matt learns how to play with others instead of over top of others during a larger-than-life music lesson at school.
Yuri is scared to have a nap after he has an awful dream about losing Golias, so his friends decide to return to the dream with him so they can all help Yuri find his big, big friend.
Yuri has trouble empathizing with Matt, who has his leg in a cast and his mood in a funk, but a game of monkeys teaches him what it means to be a supportive friend.
Lili has a hard time giving up her usual spot on the carpet and decides to create her own special spot in a beautiful aquarium that only she may sit in; but as it turns out, having only one spot isn't nearly as much fun as trying out new ones.
Yuri's upset when he doesn't get the birthday gift that he really wanted, but after working hard to prepare a jungle feast for King Golias, he realizes that a gift made with love is the best kind there is.
Matt adopts an imaginary puppy in attempt to prove that he can handle owning a dog, but after a long day of puppy mischief, Matt realizes that his parents may be right - he's not ready for a puppy yet.
Lili finds out just how much she loves spending time with her brothers after she's forced to care for them during a train ride with her friends.
Yuri worries that he's no longer special when his grandmother pays attention to Matt and Lili during a visit, but with the help of a trunk-full of elephant puppets, Golias shows him that he couldn't be more wrong.
Yuri prepares for his first ever sleepover by practicing inside a snowy cabin, and has to learn how to adapt his usual routine.
Matt's tendency to act before he thinks gets him into a whole lot of trouble when he winds up trapped inside a giant gingerbread house.
Yuri learns the importance of giving someone new a chance, after he tries to fill-in for a sick farmer on a farm full of very stubborn animals.
Unhappy with their usual picnic, Lili decides to take the boys on a "perfect" picnic, except that it's missing one key element: fun.
After leading her friends on a blind (and ultimately futile) quest for a bee hive, Lili finally learns to admit when she doesn't know something.
Matt finds out what it's like to walk in someone else's shoes, when his own shoes get rooted to the ground and he spends the day with a couple of lovely flowers.
Unable to agree on what game to play, the kids decide to split up and play by themselves, but soon realize that with just a little compromise they can all play together and have much more fun.
Matt decides that he wants to rush life and live a life with no-rules, just like action-hero Jungle Jake, but a few mishaps in the jungle show him that some rules exist for a reason.
Lili gets upset with Matt when he loses her sticker, but later apologizes after venturing into a giant sticker garden, where she accidentally loses a few precious things of Nessa's.
When their school hiking trip is canceled, Matt learns that fun can be had just about anywhere - even at the doors of a closed amusement park.
Tired of being small, Yuri visits the Land of Giants, where he's sure to find a giant that can make him big in a hurry; but along the way Yuri realizes that being small has its advantages, too.
Worried that his Valentine's Day cards aren't good enough, Matt decides to buy gifts for his family in a giant toy store instead; but a card from his best friend shows Matt that a gift made with love is the best kind there is.
Matt decides that he'd rather go on a boat ride than go to his grandmother's house, but a friendly boat captain makes him realize how much he really loves spending time with his family.
Yuri's Mom invites Lili and Matt for lunch and gives them the task of choosing the dessert, but when the two can't agree on what to have, it's up to Yuri to come up with a delicious compromise.
Lili invents a game in which she always gets picked, but after seeing her friends' disappointment at not getting a turn, she realizes that even super heroes need to share the spotlight.
While doing his best not to cry after a fall, Yuri becomes a tear-filled giant and stops the flow of water in the waterpark, forcing his friends to quickly teach Yuri that it's okay to cry.
