3 to 12 years old age effect is ideal

Magical ring positioning more accurate, powerful science triangle to let the child's little hands can not afford to call the magic fingertips 3 fingers between the pinch positioning so that children quickly learn to correct the grip pen, the training of children to correct the pen habit is a great help

Made of non-toxic and tasteless, environmentally friendly soft silicone material

Easily solve the problem of how to guide children how to hold the pen