The all new "Mega Mosquito" and as an added bonus, you get the original Mosquito free. Two easy builders, one great price. D & E engine power and mini engine power too. Powered by a D12-3, D12-5, E9-4 or an E9-6, the Mega Mosquito (Skill level 2) can reach heights of 750'. That's pretty amazing for a rocket that weighs over 5 ounces yet is simple to build. And let's not forget about the Bonus Mosquito (Skill level 1) included. That's the mini engine power of the kit. Standing just 3.8" tall, the Mosquito will go 800' high. It might take an afternoon of your time but then it's off to the flying field to "double" your fun. Estes model rocketry is recommended for ages 10 and up with adult supervision for those under 12. Unless otherwise specified, all models require assembly. Tools, construction and finishing supplies sold separately. In order to launch, a Launch system, model rocket engines, igniters and recovery wadding are required - sold separately-unless otherwise specified. Requires Estes Porta-Pad E and E Launch Controller, when launching E Engines - sold separately.