Last year, "M"s grandma got her a water table, which we had put away for winter. The weather this week was perfect for pulling the table back out. In our house, the water table is an outside toy that requires swimsuits. ;) Both "M" and "J" enjoyed splashing, pouring, and making the water wheel turn. This is definitely going to be a fun toy this year!
If you are in a mosquito-heavy climate, I suggest emptying the table every day so as not to provide a breeding ground for the biting bugs. We use the leftover water on our flowers and garden, thereby minimizing the amount of water we waste.