Cut strips of colorful paper, you will need 7 strips, one of each color if you want to make a true rainbow. Cut two cloud shapes out of white construction paper.
Glue the strips in the correct order on one cloud – glue them at the middle of the cloud Secure with duct tape. Glue on the other cloud on the other end of the rainbow paper strips. Secure with tape.
Fold the strips of paper along the duct tape; this will make it way easier to arch the rainbow later on.
Apply glue generously on the cloud. Add cotton balls. Be sure to add the cotton balls on the part of the cloud that is under the rainbow. Do the same on the second cloud.
That’s it the simple 3D paper rainbow is complete!