If you're the parent of a building addict, Pley, the self-dubbed "Netflix for Lego," may be the solution to accumulating one (or 10) too many of those plastic brick sets. Here's how it works: Each month, your kids receive a Lego set (you can choose from a small, medium, or large kit, depending on their age and attention span). When they're done creating, send the set back, and wait for the next one to arrive. Pley sanitizes each set, and perhaps best of all, there's no fee for "normal" loss of a few pieces here and there. Subscriptions range from $15-$39 per month, depending on the size set you select.