I've got some time with just my four year old daughter (no baby!) and wanted to take her to a water park while it is term time and not so busy. I've heard of aquasplash in Hemel and wondered if anyone had been there and knows if it is suitable for that age? Or could recommend any locally or within an hour or so's drive of N London? She loves swimming and can do about half a width independently and obviously I'd be with her all the time.