Still Playing School: Fine Motor Rainbow Ball Game - I have one of these at home. Not only working on fine motor skills but great busy activity!
Cotton Ball Painting - Including the munchkins in making paint would add to the fun! An economical and entertaining fine motor experience.
These LEGO Picture Puzzles are super easy to make and even more fun to play with! Put together each picture or make wacky combinations with the photos!
Trade colors to RWB for fireworks?
The Sugar AuntsBaby Play!
Ball and Tube Play for Babies, Toddlers and Preschoolers - maybe make the top open with sides to hold the balls like a pool table and add more tubes to the sides or other obstacles?