Thanks for your question Richard from Addison, what you are looking for, are the mesh squish ball.
These are stress relieve balls that have a net around them, which forces the squish to change its shape and create different and smaller balls that go through such net. At the same time they change its color.
They seem to have really bad reviews at Amazon, but for the price of 1 dollar per unit, there is no much quality we could ask for a stress ball.
Get your squish ball now and have fun while relieveing stress.