This is a physical version of the "Get the Block out of the Maze" mobile apps games, but also the Rush Hour puzzle game. This overall cost 50 cents to make, (48grams, 20$ 1kg filament) and the openscad functionality makes it easy to customize sizes for the pegs, and the base board. For example, you can change the exit from any of the rows.
The idea of this project is to help younger kids with problem solving and critical thinking skills early on so kindergarden or early elementary school. Also, it was a fun puzzle game I remember fondly, so I wanted to recreate it. The market equivalent is about $20 dollars (https://www.thinkfun.com/products/rush-hour/).
Update 1: Changed around some of the OpenScad files to make it more user friendly for customization. (Added more parametric values)