Van Gogh Sunflower diagram - give each kid a square to colour and then assemble afterward. do this but give them one to colour however they like, without seeing the original, before showing them the painting and having them do it as they see it.
Keith Haring project for my largest class! would be a super fun project for Art Club! - could have students trace their bodies in motion on butcher paper- the cut out, paint a black outline, and we will tape up to the wall and ceiling