We stayed in the Garden Wing last stay in August 2011 and it was fabulous. Our boys were 8 and 5 at the time. You get all the perks of the CR with the food, monorail, walk to MK with a more manageable price tag. Very worth the convenience if you can. The pool is great, your 10 year old will love the slide and there are sprayers and and Splash Pad area. Our room overlooked the pool area so we could always see when the pool was open. They closed for lightening and rain a few times.
Ask for a ground floor room if you want some outdoor space, as the 2nd and 3rd floors do not have balconies. That's the only drawback. It's very quiet in the Garden Wing. The Tower is noisy and very hustle bustle all the time. I loved the peace in the Garden Wing. The rooms are exactly the same, size and furniture in the Tower or Garden Wing. No difference.
It's a quick walk inside for everything or around to the buses and walkway to MK and it's a short maybe 7-8 minute walk with salamanders for the kids to watch out for the whole way.