I let my 2 1/2 yr old "play" my CoH characters. Not a lot of damage he can do selling or destroying things, but he only wants to do one thing when he "plays". He will sit and hit my costume change macros and my "alakazamreact" emote macro (which changes you temporarily into an object in the area you're in). All of them have some sort of spiffy effect with them-- getting struck by lightning, a puff of smoke, etc. He's been doing this since he was about a year old. The chat channels I frequent always say "Hey Goblin!" when they start getting random strings of text from one of my characters
Since the news CoH is going under, I've been looking for another game he might have fun in. Vanguard has an old vet award wand that gives you an illusion of a random mob in the game for an hour. Once it turned me into a bat, so now when I turn that game on, he starts shouting "BAT! BAT!" So I keep hitting the wand until it turns me into a bat.