Before I forget, if you’re ever flying out of Heathrow, I cannot recommend the Family Lounge enough. We went in there on a whim expecting it to be a room with chairs where you could let your kids run wild and we were pleasantly surprised. As you can see from the pictures (stolen from someone’s blog because I didn’t want to get in trouble for taking pictures, which was against the rules).
The family lounge is free and you must have a child to be admitted (to keep the creepers out). Be sure to pack some socks, but if you forget, they have some free socks available and the socks for 3-8 year olds will fit a 33 year old man with size 11.5 feet. There’s no time limit and they have separate areas for babies, kids and bigger kids. There’s also a baby changing room and a nursing room.
Wish this was available at all airports!