Venn Diagram TrayUse this sturdy Venn Diagram Tray for early math skills, fine motor skills, logic and reasoning, color recognition, classifying, and problem solving. Use the tray to give your students multiple activities such as counting, sorting, patterning and color recognition. Our tray measures 11" x 14" x 2" easily fitting any of our counters. Counters sold separately. For children ages 3 yrs. +.