The phrase "nerdy kid" is used to describe a child or young person who is very interested in academic subjects, often considered intelligent, but may not be as socially popular or outgoing as other kids. Full definition
I was an amorphously nerdy kid who did silly things like memorize food - eating records from the Guinness Book of World Records. (discovermagazine.com)
Screenwriter Jeremy Slater describes to ScreenCrush that the film's setting was a «kind of Hogwarts for nerdy kids,» which would have included numerous technological wonders and super-science gadgets. (newsarama.com)
I was a pretty nerdy kid and liked learning, so it wasn't necessarily that I didn't want to go to school. (thepintertestkitchen.com)