new open box new but opened to check contents. we had a duplicate of this kit and didn't use this one. everything appears to be there from a cursory check! a great STEM kit to keep the littles busy this summer! says 9+ but really depends on the child. younger kids may be able to do with a little help :) smoke-free and pet-free home bundle to save on shipping! I love to offer great deals on bundles! l also love offers!