My little 5 year old girl does it very quickly, it sorts the items into categories and then it's billiards. I bought her a plywood board to do it like that if she did not finish the installation and resumes thereafter. I bought it 3 different first she did with great pleasure. I really do not regret having bought it. I really recommend these puzzles because even if indicated above from 6 years old, she's done since the age of 4 years.