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Maybe combined interests. I find baking and rockets are fun. C12H22O11 and KNO3 both finely ground, mixed and melted in a hot pan until slightly caramelized then packed into paper tubes with a hollow core. Set on fire has a thrust of about 120 seconds. ( rocket candy ) Best done away from flammable objects. Making a nozzle helps but even lite crumbs will take off in random directions on their own.