This set, assembled once by an adult in a non-smoking, pet-free home and displayed only, is in excellent condition. Some white bricks have yellowed due to extended display, but overall, it remains in excellent condition. Before listing, I meticulously reviewed the assembly manual, ensuring a 0% missing parts rate (excluding the product box). It includes a functional light brick and the instruction manual. Please note that there are markings on the parts list page towards the end of the manual (see photo for reference). To prevent damage during shipping, it's partially disassembled, securely packed, and shipped in a sturdy box via FedEx Express, arriving within 1-2 weeks from Korea. Feel free to contact me with any questions.