The whole point of bunk beds is to have fun, right? Okay, maybe that’s the kid in me talking, because I guess they are also useful for housing two sleepy children. But if fun is what you’re looking for, you’ll appreciate this concept design. Debuting at Milan Design Week 2011, is Marc Newson’s modular bunk bed ‘Bunky.’ Assembled from just four pieces, it’s made from rotational-molded polyethylene and creates a sturdy, secure sleep and play environment for kids. Best of all for moms and dads, all surfaces are smooth with no sharp edges, and the material is highly durable and easy to clean.