Took the kids to a baseball game and it was actually amazing
Never thought my 6 and 9 year old would actually sit through a whole game but we got lucky with good weather and the home team was winning. My son caught a foul ball (well, it bounced into his hands basically) and he's still talking about it two days later. Worth every penny on those tickets.
Baseball games are perfect for that age too. Enough down time between plays to actually talk to your kids instead of constant stimulation.