Clocky Rolling Clock -- this is such a great idea for an alarm clock. It sounds like and if you oversleep, it rolls away so you have to get up to turn it off. From the MIT Media Lab, of course, where work and fun overlap.
Tent on top bunk . Source: Delightful Distractions - HOME SWEET HOME. Easy DIY using fabric or even sheets. For bottom, build in rod and use curtain hangers or tack Velcro to wood and panel for a more stationary curtain. For top bunk, hang from ceiling.