Chiken BOX Intelligence Research Institute This is for the D-2, D-3, D-4, and T-5 courses (for 2-3 year olds), covering four periods. All home instruction manuals are included. These materials were used in a classroom setting, but since the instruction manuals are included, you can work on them together with your child at home. The following materials are used and have missing parts: ◉ D-3 Period: Sticker Play These will be provided with the stickers already applied. Please understand. ◉ D-2 Period: Which one is the same size? The No. 3 card is missing. As shown in the third photo, the game is to find and select the same size object as the picture on the left from the right. All items have been inspected, but please forgive any oversights. These items have been used by a child, so there may be writing and folds. Please understand that these are used items before purchasing.