For a school project I had to make a child product in the age group of 3 till 6 years old. I decided to make a blocks puzzle with customized box and a sample book. This whole product was a lot of work.
I started working on drawing the puzzles in Adobe Illustrator. After this I started working on the blocks. I painted the blocks with a white ground layer, because otherwise the colors of the puzzles will be sucked in by the wooden blocks. You will see an example further below. After the blocks I worked on the box. I made at least 5 versions before the box was right. finally I made a book with examples of the puzzles.
Below you will find the whole process of this project. Have fun!