Building

"Building" is Episode 9 in Season 2.

Synopsis
Jeff lives in the store, but doesn't have a place of his own like Muffy does. So he attempts to build his own "clubhouse" without much luck. So Sam tries to build it for him but leaves him out of the work. They finally make a building for him out of a big cardboard box

Meanwhile, Muffy tries to break a world record by building a 23-block tower.