ESTES COX CORP-Estes: Flying Model Rocket Kit. Estes offers model rockets and rocket kits in a variety of sizes, shapes, colors and skill levels. Enjoy the fun of building a model rocket and the excitement of launching it into the sky! This package contains one Big Bertha rocket kit. Assembly required, skill level 1. Needed to fly but not included are glue or cement, paint, finishing supplies, engines, igniters, wadding, and a launch system. Recommended for ages 10 and up. Imported.