Ant Observation 3D House (Gakken) This set is recommended for science projects and more. I purchased it a long time ago and have been storing it at home. The bag has not been opened, but the box has some discoloration. Note: The assembly instructions are not included. Shipping costs will be the responsibility of the buyer. We would appreciate it if you could purchase it only if you understand and agree to these conditions. Thank you very much.