Weible Knet Fantasy Clay Block Shape Red. Packed as a block in foil. Weight 250 grams - dimensions 110 x 55 x 38mm. Weible Knet has been a high-quality, natural product from Germany for more than 100 years. It has the property of not drying out and will therefore not harden. The clay can therefore be used for years without any problems. The product is 100% natural and gluten-free, so there is no risk to children associated with this clay. Weible Knet is made from potato starch and beeswax, the dyes come from the food industry, so the clay is colored exclusively with natural dyes. Weible Knet is the best choice for your child / children.