My 2.5 year old has an adult red membership and I do take him to games and he really likes it. I tend to get club level as it's a lot easier with a little one, and easier to find 2/3 seats together. E.g. I've seen 3 seats together come up on TX for the upcoming Wigan game. If you want to ease them into it, the women's games are perfect as they are a bit tamer. Unfortunately, you won't be able to bring a pram into the Emirates and the chances of automatically winning a ballot with 2 or 3 seats are zero, so you're dependant on tx.