To make this simpler for a young crafter, cut the paper plate in half to form a half circle rainbow shape. Give your child a selection of tissue paper and help them out with the glue if they need a hand.
For older crafters, use a full paper plate and have kids form their own rainbow shape on the plate. Add cotton balls to the bottom of the plate for the clouds.
Check out some more St. Patrick's Day rainbows crafts from momstown for toddlers and preschoolers.