re: A&M Game with my son...

The Chimes is cool but probably lost on him if he is under 12. Regardless, the union food court area is a good spot for kids as they can sit for a bit and watch some early games. There is also food (albeit rather average to shitty) from vendors in front of the PMAC and you can kill two birds and watch the team and band come down the hill before going into the stadium.

If you go into the stadium early and are in the lower level, you can walk down close to the field for early warmups. My kids loved that shite.