Questron is an educational toy that uses an electronic pen which responds to special workbooks. Questron was developed by Random House in the late 1980s, and in 1986, they published two Sesame Street workbooks: A to Z, and 1 to 10. A to Z was written by Meredith Johnson. 1 to 10 was written by Louisa Campbell and Jane E. Gerver. Both books feature illustrations by Joe Ewers.
