RBP is right, we need more specifics, but I'll throw mine out there.
Our house in Seacrest is still open for that week, although we've had a few serious inquiries. It has beautiful unobstructed Gulf views and is 3BR/3BA with tower room and sleeps 10. Seacrest is on the east end of 30-A next to Rosemary and has the 12,000 square foot community pool, which is hugely popular with the kids. My three kids are 7 and under and they love the pool, the beach and the cool musical fountain that opened nearby last year at the Villages of South Walton.
Our rate for that week is $2400, Saturday to Saturday. We border the north side of 30-A -- but it's an easy 4-5 minute walk to the beach, or you can just take the free shuttle service run by our development.
Seacrest as a whole is very kid friendly -- there is plenty of green space and running room in the pool area. But there are so many kid friendly places in SoWal! I guess the X factor is your budget -- and knowing exactly how close you want to be to the beach.
Feel free to shoot me a PM.
Good luck with your search! The more specific you are about your needs, the quicker you will find just the right property.