The People At Work 40 Piece Children's Puzzle Ball is a hit with my 3 year old grandson. He loves puzzles and this one is more challenging than most. I realized that when after putting a flat puzzle together recently for the first time, he turned it over and put it together on the grey side. I asked him why and he told me the colorful side was too easy. If you are not familiar with the round or puzzle ball concept, it is very cool. The pieces are shaped to put on a round form. You then put the two halves together to make a puzzle ball. It is fun to play with an really excellent in development of fine motor control and spatial concepts. An added plus is that Ravensburger puts together a quality product. They are very durable and with this grandchild that is a real necessity.
If reviewing a product, it may have been received free of charge. That will NEVER have a bearing on my recommendations.