Cotton Ball Painting - Including the munchkins in making paint would add to the fun! An economical and entertaining fine motor experience.
Easy and fun shape sorting
Mixing Primary colours squishy bag experiment - would be cute with the book mouse paint
Improve fish by using own swirly watercolour paper, do some shells, jellyfish and seaweed. Background could be wavy in two or three shades of blue.
Can help students in the stages of emergent literacy.
Cotton swab letter painting-learn to "write" letters and numbers by painting to learn letter recognition and how letters are made.