Wow baby bath is such a good idea! Must drag it down from the attic.
We have a cheap sand table that my mum bought for sand and water, and its ok. But on the really hot days, I've been emptying the 2 big ikea toy boxes we have and filling them 1/3 full. They LOVE it! And its a little less scary imo too as its so narrow they can't slip as easy as they would in a pool or anything.