Karl builds a spaceship but no one thinks it will fly. An unwelcome summer rain gives Michael a new perspective on fun.

Addy gets frustrated with Karl for not sharing a game. Karl receives a toy robot that isn't what he expected.

Karl and Michael feel badly after accidentally soaking Addy with water balloons. When Michael and Addy build a go-kart, Karl feels left out.

Michael is hired to pet-sit a neighbor's dog for the weekend. Things don't go as planned when the kids try to watch a lunar eclipse.

Addy feels sad after losing a cross-country race. Karl is unwilling to give up his favorite shirt, even though he's outgrown it.

Karl is afraid to visit a barber for the first time. Michael becomes determined to make the perfect paper airplane.

Addy looks forward to a peaceful painting session with Stillwater. Karl finally ties his shoes by himself but worries he won't be able to do it again.

Karl faces his fear of crossing a creek in the woods. Michael sees that Addy looks sad and wants to cheer her up.

Karl accidentally breaks a branch on Stillwater's cherry tree. The kids try to protect their sandcastle from being washed away.

The kids think it's Stillwater's birthday and plan a surprise party. Addy is disappointed about not getting a lead role in the school play.

Michael is upset when Karl trades a rare game card. A homemade snow scooter leaves Michael feeling frustrated.

Michael feels abandoned on Halloween when Addy gets invited to a friend's party, and Karl decides to stay in because he's afraid of ghosts.

While helping Stillwater make treats for the Winter Solstice Festival, the kids learn he plans to share some with a neighbor they're wary of.

The arrival of Stillwater's niece Koo has Karl feeling a bit unseen. Addy puts on a show with her brothers but needs to learn to collaborate.

Karl is disappointed his gem museum doesn't attract more visitors. Addy's time with her classmates gets disrupted by Karl's antics.

Addy forms a band with her friends and discovers playing together is harder than she expected. Michael's day gets off to a rough start.

Michael feels overwhelmed by how long it'll take to build his dream treehouse. Karl copes with the loss of his favorite climbing tree.

Karl is upset that MuMu, his favorite stuffed toy, is “broken.” Addy feels betrayed when her best friend spends time with someone else.

Karl and Koo think of ways to make their playdate last forever. Stillwater is anxious about everything he has to do before his trip.

Stillwater shows the kids his worm farm and other things he does to live green, which inspires them to come up with more ways to help Earth.

Karl's excitement for Stillwater's return makes the wait that much harder. Addy takes on too many requests for the school's bake sale.

Koo is caught off guard when Karl introduces her to his friends. Maya and Addy show Tommy kindness as he deals with the loss of a loved one.

Michael plans a fun day for Karl and Koo, but he wants them to play his way. Karl and Koo lose Michael's autographed baseball.

Addy is offended when Michael doesn't like her poem. Michael buries his nose in a book during a group hike with Stillwater.

Michael is nervous about meeting the new kids across the street. Koo attends her first birthday party and is concerned about her gift.

With Addy home sick, Michael finds it difficult to enjoy a beach trip with Stillwater. A critter causes trouble in Addy and Maya's garden.

Michael, Molly, and Leo build Jasper a hideout, but he doesn't seem interested in it. Karl and Koo set off on a daring overnight adventure.

Addy worries her new book club will find her favorite book too childish. Karl spends a day at the beach looking for buried treasure.

Michael gives himself a hard time for missing the game-winning catch. Addy feels left out when she isn't invited to a birthday dinner.

A bored Karl takes out his frustrations on everyone around him. Michael struggles to finish an art project for an upcoming fair.

Karl and Koo's competitive games start to ruin their fun. The kids rake Mr. Morgan's leaves, but a gust of wind undoes their hard work.

Addy wonders how to handle a surprise find in her yard-sale purchase. Michael can't stop giving Addy “helpful” advice.

Karl gets upset when he reaches the end of his favorite book series. Addy sets an ambitious goal to get to the top of a climbing wall.

Leo deals with stage fright on a project he's presenting with Michael. Karl envies the attention Emma gets from the cast on her arm.

Addy and her friends unknowingly make Lexi feel left out at a sleepover. Michael's complaints put a damper on Molly and Leo's first snowfall.