Educational Insights® Play money coins and bills tray is ideal for ages 3 or above and grades preK - 12. Tray has reproductions of American money to encourage realistic play and authentic learning. These ultra-realistic sets feature the most realistic reproductions of American money permitted by law to encourage realistic play and authentic learning. Age group and grade: Ages 3+ and grades pre-kindergarten - 12th. The most realistic available! Grades K and up. Subject: Cash registers. Small parts. Not for children under 3 years. These sets feature the most realistic reproductions of American money permitted by law to encourage realistic play and authentic learning. Using money to teach math skills is a relevant and motivating learning experience. Lets pretend play money coins and bills tray helps to teaches math skills which is both relevant and motivating Learninging experience for grade P - 12.