My sons 2 and 3yrs old love to play in this sand/water play box. We keep it outside and it doesn't get moldy or gross when the cover is on. I put water on 1 side and sand in the other but they combined them both and it's more like dry mud instead of a water side. 

Pros: nice big umbrella to block sun. Easy to store
Cons: Wish it had wheels to make it easier to move around.