Sonic Stress Ball Let Sonic relieve those pent-up frustrations with this Sonic-shaped stress ball Approximate diameter: 3 in Sonic the Hedgehog first sprinted across computer screens in 1991 and has since become a $1 billion dollar franchise Let Sonic relieve those pent-up frustrations with this Sonic-shaped stressball Approximate diameter: 3 in Sonic the Hedgehog first sprinted across computer screens in 1991 and has since become a $1 billion dollar franchise