4 years & up. Add more paint to your art center with these Bold Colors Tempera Cakes with Tray - Wet to Paint for Art Projects. Children will enjoy using or mixing these 6 colors as they paint their art masterpieces. The tempera cakes are complete with a durable molded palette to hold them in place. Encourage your children to identify the colors as they paint with them. Use these to demonstrate to your children what happens when two colors mix. Cakes measure 2.25"L x .75"W.