Age: Preschool+
STEM: DIY Engineering
Family: Dad and son

Lots of uncommon scenarios in this DIY building book. For one, the dad is not a Mr. Fix-It and is hesitant about the tree house construction but encouraged by his son. After four trips to the hardware store, they have the supplies and set to work. Although the finished product doesn't have all the commodities of Russell's original plan, he loves it, nonetheless.

When a neighboring boy has a construction crew build a bigger and more impressive tree house, Russell is impressed but, it turns out, not jealous.

Spoiler

There will always be a better tree fort, "But not a better dad."

Not the most likely reaction from a child but still sweet.