Challenge your child to find as many things as they can that are blue. Get creative by limiting the game to a specific time (three minutes or so) or place (the grocery store.) Have them count how many they find. Switch it up by looking for letters or objects instead.
See what your child is learning
Your child is practicing focusing in this game. They are also using their memory to remember the color and the number of times they have seen it. Playing this game with different rules helps your child learn to think flexibly and make new connections.