18 months & up. These Magnetic Write-On Wood Cookies make the perfect classroom companion. Durable and easy to clean, these blank wood cookies have write-on/wipe-off surfaces that are perfect for notes, student's names, labels, drawings, and other daily classroom needs. Set includes 30 pieces that each have a magnetic backing. Cookies measure 2" in diameter x .5"H. To clean, wipe with a dry cloth or dry eraser.