I bought this because my elementary school child kept walking around during class. I used it at school for about six months. They've calmed down recently, so I'm offering it to someone who can use it. The color is gray. The following is a description from another site: TOSS Sensory Tool Series "Fumio-kun" Features of Fumio-kun ○ Can be attached to the legs of chairs and desks with one touch! ○ Doesn't make loud noises during use, so it won't disturb other children. ○ Recommended for children with poor posture or those who exhibit hyperactivity! ○ Can meet children's sensory needs* (sensory desires) and provide reasonable consideration. A sensory tool is a sensory stimulation teaching aid that addresses a child's sensory needs* (sensory desires) to stimulate their senses and adjust various behaviors. In the Japanese educational field, the tendency has been to "remove" stimuli caused by children's unnecessary actions, but by providing the sensory stimulation that children seek, it is expected to have the effect of calming them down and helping them concentrate.