Kids enjoying the Play kitchen Mud Pie Set. Though it is more for outdoor play toy, but can be played indoors also. This toy combines traditional water-and-mud play in a single unit.

It took me 20 mins in the morning to assemble this outdoor toy. After that the kids were at it for over two hours. I believe there's something special about outdoor play.
I'm still waiting for the perfect mud pie, though! Yet I'm happy to be waiting