Easy abstract painting that anyone can do! Just blob the paint on the canvas in random spots and blend! (would be interesting how students could make different pictures w/ the same colors and same blob positions)
Golden Acrylic Paint Medium GAC900 turns any acrylic paint into a fabric paint which can be brushed, airbrushed, or screen-printed onto fabric. It leaves the fabric soft and, if heat set, can be washed as normal. Available at art stores.