Shells and Water Toddler Play. This would keep children of all ages entertained for quite a while :) we're going to do this totally do this, but add play sharks with our shells and little men to "swim".
20+ Cool and Fun Water Play Ideas for Kids in Summer
We enhanced the water tray by adding a washing line. As well as wringing the clothes of water and in turn developing gross motor skills they also developed their fine motor skills by squeezing open the pegs! Also lots of fun!