I enjoyed "From Nand to Tetris: Building a Modern Computer From First Principles" https://www.nand2tetris.org/ https://www.nand2tetris.org/ It shows some of t

I enjoyed "From Nand to Tetris: Building a Modern Computer From First Principles" https://www.nand2tetris.org/ https://www.nand2tetris.org/ It shows some of the basics of how a modern computer works. The lessons are like little puzzles and can be engaging. It should be pretty accessible to kids. You do need access to computers to complete the work though.