Agreed. But if they don't use them afterwards then the rental is best. Personally I'd buy a cheap one and keep it free from moisture. Then you can peep.
Thanks for all the suggestions. This will be my kids first trip to the stadium, but the wife and I have been there numerous times. I just want some binoculars for my kid's first game. That way they can check everything out around the stadium.
I will probably just go with something cheap like a couple pair of these here. The 8x21 pair that only costs 12.99.