Third Grade Peter Max Hearts Warm vs Cool, Border and heart match, inside border opposite, dip brush into multiple colors and spread paint (not back and forth to blend). Next session add details with opposites, add black detail lines to add interest.
These are some of the prettiest shadow boxes I have ever seen. I have loved this form of art since I was small, felt it had enormous potential for real magic, but have so rarely seen something truly special.
Swipe art is good for older people with limited hand mobility. Put dots of paint on the paper or canvas then let the participant swipe with different tools: small heavy cardboard, sponge, flexible brush, the butt of a closed hand, etc.