3 years & up. Encourage your children to practice their writing and vocabulary words with these Dry Erase Sentence Strips for Practicing Writing and Sentence Formation. These sentence strips promote literacy, dexterity, fine motor skills, creativity, and imagination. Encourage children to identify the color of the marker they have as they practice writing letters, numbers, vocabulary words, or simple sentences. Eraser and pens are not included. Pack of 30. Ruled 1.5" with red baseline and .75" dotted midline on dry erase side.