These are pre-owned, but I'm selling them because my child doesn't play with building blocks. The person I received them from also didn't use them, so they appear to be in great condition. However, they are quite old, and there are some spots on the top surfaces of the wooden blocks (see photo 3). They are a domestic product from Kawai Musical Instruments, so I believe they were originally a high-quality item, but please be aware of the aging. I've checked them thoroughly, but there may be some minor oversights. Please understand that these are used items and may have minor scratches. I would appreciate it if you could consider this before purchasing. We do not have any pets, and we do not smoke. I'd be very happy if someone could use these blocks, as they are still perfectly usable. I will do my best to ensure a smooth transaction, so thank you for your understanding.