Here's a big achievement with tiny blocks. A team laid out 2,000 "mini dominoes" on a board and attempted to achieve a world record for mini-domino toppling. Spoiler alert: around 0:40, the team messes up for the first time, accidentally knocking over their stack prematurely and forcing them to start over. But after several resets, it worked. This is oddly satisfying, mainly because I didn't have to use tweezers to set it up:

If you liked that, you'll freak out over 10 Minutes of Dominoes Falling and other such feats.