Want to keep your kids busy in the yard without a lot of effort? A simple clothesline fort is the way to go, giving your kids a cozy place to play away from prying eyes. Simply drape a flat sheet over the clothesline and use stakes or rocks to hold down the corners, forming a pup-tent shape. Lay a tarp or blanket over the ground to keep kids dry and clean and to ensure a safe spot for playing. This minimalist spot will entertain the kids while you enjoy a backyard barbecue or get-together, and best of all, you can leave it up as long as you want – or at least until it's time to dry the laundry.