Poly Mini Bulletin Board Set Pictures Emotions Smart Poly material has been designed for charts in the classroom and home Write on wipe off heavy duty washable all poly material no lamination needed Material is designed to be long lasting easy to clean waterproof and durable for many years of use Use with dry erase or water based markers and washable crayons for interactive play and educational development Use with Ashley Smart Tak pins tacks staples etc to hang in the classroom Great for reusable learning Each bulletin board set includes 35 pieces Specifications . Suggested Grade PreK to 1st. Suggested Age 4 to 6. Weight 0 5 lbs