CSP online, minimal spanning tree interactive

Either last year or the year before there was an online, interactive website that was related to the minimal spanning tree - the premise was to pick the fewest number of nodes to connect all the choices. I think it was a source in the optional lessons.

Does anyone happen to have that link? I wanted to use it with a different class. Thanks,
Elaine Demeter

@demetere Happy New Year, Please see the information below:
19-20 Optional Lesson: Algorithms Detour - Minimum Spanning Tree [ link ]
The minimum spanning tree in action on VisuAlgo [ link ].
Please let us know if you need additional assistance.