Soft stick; will not injure the child if it falls on it. Develops fine motor skills and logical thinking. http://www.ikea.com/th/en/images/products/mula-stacking-rings__26095_PE111081_S4.jpgMULA Stacking rings, multicolour, beechhttp://www.ikea.com/th/en/catalog/products/50167686/501.676.86199 THB