[kkylin]

As others said, if you can post a link that would be really great. When I've taught probability in years past, I always showed students Galton boards on YouTube, but a real one that doesn't break and doesn't break the budget would be much better.

[gwern]

You can just search Amazon. There's nothing special about a quincunx, they're simple. Any search query on Amazon, whether 'Galton quincunx' or 'Galton bean machine' or 'Galton board' will pull up a bunch, I just checked.