Alphabet Recognition Bug Squash for Pre-K and Kindergarten is a great activity to use to practice working with letters and RTI for kindergarten. There are 6 different uppercase sheets and 6 different lowercase sheets. The teacher/instructor can write the letters on a note card and pull one letter at a time out of a hat. If the child has the letter they can "squash" it using a dobber. The first child to squash all of the bugs wins!