This is what Julia will have for a birthday cake this year. It's cute AND sooooo easy. See the pin (in this board) for dozens of activities with the same theme for young children; I'm going to do a few at the party and complete more with my kids this month. Perfect book/activities before we visit the butterfly display at the Fredrick Meijer Gardens.
RAINBOW STICKS: These look really effective, don't they? You could make and eat these in combination with learning the rainbow song, finding out about different colours (for younger children), or learning about the role of colours in food and health (for older children). Get children to assemble these themselves, following the colour order.