A sunflower house is an easy and exciting project for you and your kids. I am currently growing my second one in the same spot. I marked off an 8'x8' square. I double dug a furrow, hoed a shallow moat around the furrow, and put in sunflowers which I had sprouted into seedlings elsewhere. I alternate a mammoth variety which grows about eight feet, and a small variety which grows about 4 feet. The tall ones impress the kids by growing taller than they are and they provide abundant shade. The kids enjoy looking closely at the flowers, eye-to-eye, on the shorter ones.