Didax Uppercase Sandpaper Letters - 28 Tactile Alphabet Cards For Grades Pre-K To 1St - Educational Letter Resources For Young LearnersBeginning readers and special needs students will benefit from the tactile experience of these letters. These 4 5 16' x 2 3 4' cards are covered with fine yellow sand and help students make the connection between the physical movement of forming letters and the actual letter shapes. The set contains 26 standard upper case letters.