"I build everything with my 9 year old daughter. She loved building it. The elves theme is excellent for girls, keep making them and expand the theme and story line. The vertical building of the dragon's body and legs is great for thinking skills. Not only is she stacking pieces but pieces connect to the sides offering depth through building on second axis. She loved turning the body to feel the sleek design, she told me several times. Special pieces connecting through male and female dowel systems is excellent. It almost gives the feeling of creating a mechanical system. The only design flaw is the golden caps on the wings, it seems like another pin could have been placed in to hold those on better. She loved creating the moving parts on the castle structure. She mentioned that how cool it was to build something that moves like a secret sliding walkway. Continue with the Elves systems they are excellent with more engineering of moving components. This is a great set that sparks the imagination of girls and includes them into the more male dominated building world."