Made from corn starch, Cadaco's EnviroBlox are the biodegradable alternative to traditional plastic building blocks. You wet the packing-peanut-style Blox with the included sponge to stick them together, and instead of having to shelve away a bunch of pieces when playtime is over, you just run the kids' creation under water to watch it melt away. Warning, though: EnviroBlox' melting capabilities can be alluring enough that more mischievous kids may get off on simply watching the blocks dissolve.
The EnviroBlox 400-piece X-Treme Builder Set (pictured) is $9.99 from Amazon, while the more stocking-sized Deluxe Set is $6.99.
