3 years & up. Help your children practice new critical thinking skills with this engaging Trays to Develop Early Problem Solving Skills. This durable trays encourages children to practice fine motor skills, early math skills, logic and reasoning, color recognition, classifying, and problem solving. Use the tray to give your children different activities such as counting out pieces and sorting them by color. Counters sold separately. Measures 11"L x 14"W.