Here's a rhyme you can use also:
5 little crayons waiting in a row.
The first one said "I'm red you know!"
The second one said "I'm green like a tree"
The third one said "I'm blue as the sea."
The fourth one said "I'm as yellow as the sun."
The fifth one said "Being purple is fun!"
Five little crayons as happy as can be,
Coloring pictures with you and me!