Fabric paint on an apron or on fabric that you could sew up into a pillow or something(pot holder?placemat?)?
A glass jar turned candle holder by glueing tissue paper on it?
A paper mache bowl?
A sun catcher made by glueing glass pebbles to the glass part of a frame and leaving the back off?
A book of his drawings?
A painting on canvas?
A painted mug?
A framed collage?
A necklace made from clay beads?
A notebook with a decorated cover?