When Iggy gets a new scooter, the only one more excited than Iggy is Sydney. The problem is, Iggy doesn’t know how to scooter. He hurts himself scootering around the treehouse, and fear keeps him from getting back on it again.
Culture convinces Iggy and his friends that they should just do what they want and not follow the rules for a day. But Iggy quickly learns the value of rules after a run-in with a baseball and a broken glass vase.
Iggy receives a plant, and he’s told by Culture, for his plant to grow big and strong, Iggy must be harsh with it, but when this approach fails, Mr. Kirk teaches Iggy the value of being gentle.
Annie and Iggy are getting ready for a big night of camping on the porch. But when Iggy gets too bossy, Annie eventually has enough of him ordering her around and she quits.
Iggy becomes obsessed with his snacks while Sydney the Bunny becomes obsessed with activities. Mr. Kirk attempts to encourage healthier decisions and to find a healthy balance.
Iggy tries to build Carlos a new home, but it keeps falling apart. Mr. Kirk advises Iggy to not give up and that he can do hard things. Eventually, Iggy is able to make a little home for Carlos.
Iggy is having problems listening to others. Without thinking, he decides to mute MAPLE, but will his decision to mute her backfire in the end?
When it feels like everyone forgets about his hatching day, Iggy decides to ‘forget’ about all of his treehouse responsibilities, too. When the surprise party comes, Iggy isn’t the only one that gets a surprise!
When Culture sees an opportunity to get all of the treehouse snacks, he tricks Iggy and Sydney into believing in the Snack Monster. They must overcome their fear to find their missing snacks, prove there’s no Snack Monster, and save Carlos.
Mr. Kirk is sick and needs rest but Culture convinces Iggy into believing the treehouse tree is dying and needs Iggy more than Mr. Kirk does. Iggy eventually learns that people are more valuable than trees, even the treehouse tree.