Water wall Love this. Also like the idea of something that is changeable.more flexible. But using wood is appealing and the water stays against the "wall" so it has the thrill of movement w/o getting children very wet. That's appealing.
Make a River! Easy Imaginative Play in the Sand Pit.
Any slide for adults in a house is a great idea, but this one contains a water slide. Excellent choice of transportation and you can even get a shower on the way out of bed going down to get breakfast!