Violets are red. If you agree, You've got rocks in your head. Under the color names, ask your students to list words that rhyme with the colors. Invite one of your students to pick a color. Recite the following stanza and have your student fill in the blank.
Roses are pink.
Asphalt is black. Violets are blue. See if any of your students can complete an entire poem without any help from you. In other words, after picking a color, have them create the last two lines on their own. This is a challenging creative exercise that some of your students will love to work on overnight.