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 of whom they’re wary.
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 the Earth.
