Students in our 7th grade class built laptops based on the Raspberry Pi. There is a satisfaction of building something, then turning it on for the first time and watching it awaken. In the next few weeks students will evolve these Pi-Top kits further by designing and building from scratch small modules that will snap into the Pi-Top rails. These modules will be their own subsystems with seperate batteries so they can work within the Pi-Top, or out in the world on their own. The design challenge is to build within physical constraints as students prototype their modules.