My daughter built her first rocket, the Quark. We first launched it in our backyard. We used a 1/2 A engine. It soared over the house into the front yard. It took us about ten minutes to find it. It landed on its nose, buried in the ground by a tree. We tried it again at local high school track. We lost sight of it and did not see it come down. After searching 20 minutes, we located it. These small rockets are great, but hard to track and find afterward.