Paint types- if young children under two (or children who like to put paint in their mouth) will be participating in this activity, I recommend that they use tempera paint, as it is least toxic and totally kid safe. For older kids and adults, acrylic paint is best. Take note that these paints are water solubleĀ and will require an outdoor varnish to seal the paint and prevent chipping. Always spray the varnish outdoors.