Trace and find the number 15. 1. Tap the button to start. 2. Tap the button, and pick a color. Then, trace the white 15 in the center of the page at least 3 times. Say the name of the number each time you rainbow write it. 3. Circle any 15's you see around the middle number. Say the number each time you find its match. 4. Tap to submit your work.