A big pool might scare that little one. Her own "safe" pool with her owngiraffe and her slide may be preferred. Seven, well that's different but the other one is little. If a sprinkler is scary, 7-year old sister splashing can't be fun!!

For the 7 year old - Noodles. neat towel, kid-size lounge or chair, rings. I've even seen little swimming fish (batteries) for pools. A box of neat stuff!!!!