Use with No. 2 Pencil or Melissa & Doug Learning Mat Crayons. Not for use with regular crayons, markers, or dry-erase markers. Washing Instructions: Use a clean eraser to remove pencil marks. Use a wet paper towel to remove crayon marks. Dry thoroughly before reuse. Fully clean with warm water, soap, and a non-abrasive sponge, and allow to dry.