Thank you for viewing! This is a puzzle where you think about and assemble Kumon's net diagrams. It's a thinking-based toy that strengthens spatial reasoning skills, and the target age is from 6 years old to adults. This is a new, unused item that has been taken out of the box but not played with. The problem book has only been flipped through, so I've listed it as "Like New." All the parts are present and in beautiful condition. If you don't need the box, I can offer a discount. It will be shipped in simple packaging. Thank you.