Now that you are a "Cool Grandpa", RC Cars/Trucks make perfect sense again.
Go easy with the 1/8 scale and 70mph models, they pack a ton of energy as E=MC2 and something has to give when they meet a stationary object... Keep yourself and others away from its path. These are not the toys from 20 years ago.
I suggest a ramp for jumping action fun and learning to control the model in the air.