From the Dr. Seuss Stationery and Accessory Collection. Dr. Seuss 10 Color Pens. Four fun designs featuring your favorite Dr. Seuss characters! Select ink color by pressing coordinating tabs at top. To retract and change color press button on top. Ink colors include pink, green, blue, yellow, black, orange, purple, brown, light blue and red. Includes 12 pends which measure approximately 5" long.