Enjoy this Mini Activity Book by Buki. Basic addition and subraction. This activity book contains 12 pages of simple addition and subtraction exercises and a page of colourful stickers from 1 -12. Your job is to find the solution and place the correct sticker in the square. 24 pages. Ages 4-7. Small Buki Books are 6” x 6” At least 18 different activities per book Educational & fun!