Do you know the book "Mrs Wishy Washy" by Joy Cowley? I love it. It's easy for the littlest ones to get involved recognizing the animals (can make their sounds), repeating the phrase 'wishy washy', and acting it out.
This week our water table is focused on the book.
The scrubbing was fun but watching how the mud clings to the brush and then slides down the side of the tub is fascinating too.