Customized Stress Relievers, Color Changing "Mood" Stress Balls - Heat Reactive & 2.5" Diameter, Everyone will be forgetting their worries when you place one of these groovy giveaways into their hands Measuring 2.5" in diameter, these color-changing "mood" stress balls react to the warmth of your hand This product is not intended for use by children or pets It may present a choking hazard to children under 3 years of age. ... #26616 $2.10/each.