Think and work it out is the 4th book in the series of preschool activity books. It is a book for children aged 5 to 7 which can help them go through the first steps of mathematics. The author persuades parents to spend time with their children and by encouraging them to solve the problems in the book, to help them develop their thinking abilities and alertness. The book has 3 pages with stickers with different usage - some stickers are a part of the task (stickers with numbers and letters), some are to mark the correct answer and some are for decoration.
