Check out this Keyboard tear-down from Squirrel Friends TV. They have a bunch great resources for young engineers on their site!
Founded in 2012, Squirrel Friends Productions believes that all children deserve great media that piques curiosity about the world, while preparing them for it. The Brooklyn-based collective, founded by Jennifer Treuting and Kristen McGregor (both children’s media producers and comedians) develops short, research-driven programming focusing on creative and/or comedic problem solving. Currently in development on a short web series and a child-led documentary, Squirrel Friends Productions aims to make children laugh while they learn something new.