You might want to try a radio control hobby (planes, cars, boats, etc) – dont just fly them – build them together. Or get a rocket kit, make a rocket and then go launch it a couple dozen times 🙂
When my son was that age BattleBots on ComedyCentral was popular. So we built a couple battlebots – 60 lbs lightweight and 120 lb. middleweight. Through trial and error we eventually made it to the TV rounds in the last season. We built and rebuilt bots together. Eventually we got interested in SozBots (16 oz bots) which were cheaper to build and rebuild – which he did himself. We competed in Battlebots for three seasons – it was the best of times!
