Simon is 9 in this video. The video summarizes about a week of him working on the Sorting Visualizations project: https://repl.it/@simontiger/SortingImproved
Simon writes: I've built a giant project; a website / community project / platform for making algorithms! I've built Bubble Sort, Selection Sort, Insertion Sort, Mergesort, Quicksort, Heapsort, Shell Sort and Radix Sort.
I'll also make a pathfinding part of the project, through a maze and through a graph. Then, I'll pass it on to the community, and let them put more algorithms, more types of algorithms, and even new features on the site!