Best pool games for older children...any ideas??

[Ilovemybabygirls]

I have just had an operation on my leg, so I am a little sore, but can swim from next week and wondering what I can do with my dds on holiday (7 &10)? My mobility is not great, but would love to have fun with them without it hurting or pushing my luck.
Has anyone any really fun easy games to play on holiday both in and out of water? I really want to make the most of this break with them, as I need another operation in the autumn. Thanks in advance.