When using any type of natural wood; knots, grains and imperfections are to be expected and can be seen through the dyes and paints.
Our puzzles are made with non toxic water based dyes and sealed with food grade mineral oil. *** Our puzzles are not meant to go in the mouth, the colours may bleed and they could be a potential choking hazard if left unattended. If my accident our puzzles end up in your childs mouth the finish is completely safe.***