After the baby sensory club ( which my preschooler also helps with) I kept the paddling pool up with the Krispies in. My 3 year old wanted to play with it so I added some magnetic letters and numbers.
He transferred the coloured Krispies to add more volume to hide the letters/numbers.
He played with the pool for a while on his own but then wanted me to find the hidden objects and hide stuff for him.
I gave him little pinches whicjph he used to squash the Krispies . He enjoyed this part especially and the diggers were soon forgotten.