My 7th grade science fair project. 5 large solar balloons: 6 Meter Tetrahedron Balloon, 5.5 Meter Tetrahedron, 5 Meter Tetrahedron, 4.5 Meter Tetrahedron, and a 4 Meter Tetrahedron. Balloons are all constructed out of .07 mil black trash bags and masking tape. I used Instamapper app to track the balloons on cheap Boost Mobile phones. www.instamapper.com. I inflated the balloons with a leaf blower. The 4.5 meter balloon got stuck in a tree but blew back out. I repaired it and launched it again. The 4 meter balloon failed to launch because the wind picked up. The 3 largest balloons all reached altitudes above 14000 meters. I’m 12 and I built an airship that traveled over 53000 ft high and flew over 500 miles for about .50. Question or comments to BlakesBalloonProject@gmail.com Update: Thanks for all the views and the great comments! And all the post to Facebook. Please share with your friends.