Duck Duck Moose’s new Build-A-Truck ($2) allows kids to — you guessed it — build a truck. Children can create a truck, then add paint, decals, wheels, and all sorts of other crazy contraptions to their vehicle. Kids can then race their truck, which is legitimately fun, and the design chosen for the vehicle affects how the truck drives. Collecting stars during the racing game lets kids unlock additional objects to customize the truck. Cut…