He is the smartest of The triplets, possessing an I.Q. just north of Einstein's. Simon is the tallest with blue eyes and dark brown hair and wears circle glasses. Simon possesses a very dry sense of humor, as well as a keen wit. Alvin is charming, musical (able to play the guitar, piano, and harmonica, among others), and headstrong, with light brown hair, tall but as much, and Theodore; shy, sweet, kind, caring, loving, sensitive, gullible, trusting, naïve, and innocent, huge eater and short.