Tired of the Man with the Yellow Hat's house rules, George endeavors to build a tree house to set his own rules. George has to figure out the right way to build his tree house including obtaining the right materials and construction method.
The CyberSquad tests if its contraption serves as a raft. While it floats, it contains holes, and Digit gets attacked by piranhas through the holes. The group determines it needs to build a raft with no holes and no overlap. Together, they combine square pieces that they find on the floor to make a big raft. Inez explains that they've created a tessellation, and she defines the meaning of the word.