Just for fun: my friend and I 3D printed a model of SelectionSort: https://gfycat.com/HospitableTenderDiamondbackrattlesnake. Each successive layer behind the front one is one iteration of the algorithm. We also made mergesort and quicksort versions, and I'm working on a model of Dijkstra's right now.

To be honest the 3D model doesn't really confer a greater understanding of the algorithm as hoped, but it's nice to play with.