Info: Textured hand exerciser and anti-stress ball.
This light blue rubbery ball contains microbeads and is covered in nice-feeling, pliable 'spikes' which combine to not only provide a great massage for your palm and fingers when you squeeze it, but also help relieve stress and anxiety. It’s small enough to take anywhere (about 6 cm in diameter - about the size of a pool ball - but it can squish much flatter to fit in a pocket). It can also be a great sensory toy for children to increase mental functioning and creativity, particularly by alternating which hands to use it in.*
*E.g., see "Squeeze a Ball With Your Left Hand to Increase Creativity" in Psychology Today, April 26, 2013.
Warnings:Choking hazard: not for children under the age of 3.