Get out the toolboxes--it's time to build a tree house with Daddy, and that's a fun day's work. What will you need? Let's look inside and see: a tape to measure the tree, a red-handled saw to cut the wood, and a wrench to turn the bolts. Hammering's cool, and the screws that the screwdriver drives in keep the door in its place. The final touch is a "Secret Tree House" sign, and the house is done.