About Kaitlyn Siu Books by Kaitlyn Siu What's Branching?: A Birthday Adventure! by (author) Kaitlyn Siu illustrated by Marcelo Badari Ages 3 to 7 Grades p to 2 What's Decomposition?: A Rock-and-Roll Adventure! by (author) Kaitlyn Siu illustrated by Marcelo Badari Ages 3 to 7 Grades p to 2 What's a Variable?: A Story Time Adventure! by (author) Kaitlyn Siu illustrated by Marcelo Badari Ages 3 to 7 Grades p to 2 What's an Algorithm?: A Splash Park Adventure! by (author) Kaitlyn Siu illustrated by Marcelo Badari Ages 3 to 7 Grades p to 2 What's Sequencing?: A School Day Adventure! by (author) Kaitlyn Siu illustrated by Marcelo Badari Ages 3 to 7 Grades p to 2 What's a Loop?: A Tree House Adventure! by (author) Kaitlyn Siu illustrated by Marcelo Badari Ages 3 to 7 Grades p to 2