Coilz are for playing and collecting! Each bag contains four Coilz with different pictures. Coilz are small round springs that can be used a bit like marbles. They roll and jump, and games can be invented with them. The spring also makes them wonderful to hold in the hand and to press with two fingers. This promotes finger force regulation, strengthens the fingers and can have a soothing and de-stimulating effect as a fidget.