^-^ It includes 17 instruction cards of different difficulty to help children to finish. These cards in bright color are cute and attractive perfectly appealing to children. ^-^ Made from high quality natural wood material with eco-friendly water paint these blocks are wear-resistant and scratch-resistant to play with. Manufacturered by YuFanKits. ^-^ They can build various patterns with the building blocks which greatly cultivate their patience concentration thinking imagination and hand-eye coordination. ^-^If there is any problem with this product please feel free to contact us we will reply within 24 hours and try our best to resolve it. ^-^ Through fine grinding and polishing process the block edges are round and smooth without any burrs which does not hurt children's hands.