Melvin has light skin, freckles, and light brown hair with some of it swept upward. Melvin wears glasses, a white collared shirt, a red bow tie, a yellow vest, shorts, and brown shoes. In the movie, the frame of Melvin's glasses are green, his bowtie is a golden yellow color, and he sports a watch

He was in the science classroom, coming up with plans to build another invention. His plans were foiled yet again earlier, so he'd just have to try again.