Answer the soothing call of water as it trickles in your own backyard. If you're ready to add outdoor projects with wow-factor to your yard, this is it. This DIY water garden stream uses pre-formed shells for ease of construction, and the result is a stunning feature that is part pond, part waterfall—and all parts awesome. If a full pond isn't in your budget, consider this handy pond in a box, which will fit small spaces beautifully.