A game that, while very simple, can engage younger and slightly older children (up to 5 years old) as it has 3 levels of difficulty depending on age or familiarity with the game. It includes blocks/shapes that the child must arrange in a specific layout, according to the card they choose. Each card shows the outline of the arrangement of the shapes (problem) on one side, while the other side shows a photo of them (solution). I recommend it because 1. each "round" is completed quickly, so children do not get bored, 2. they can try it without the help of an adult so they can practice and play on their own, and 3. it exercises concentration and observation skills.