I enjoyed number 8 until I put a lawn dart into my mom's roof.
I'd have liked 9 & 10, but now that I'm older I know how to build 9 and where to get uranium ore.
Mixed my own zinc and sulfur solid rocket fuel as a young teen; learned how to operate a lathe to make my own rocket nozzles. "Rocket Manual for Amateurs" by Capt. Bertrand R. Brinley was my rocket bible as a teen. Good times.