An inexpensive LED digital clock kit, the SH-E 879

While this exact kit seems to have been discontinued, there are other kits which appear to have "borrowed" the same circuit design being sold for as little as $4. Just search for "AT89C2051 clock kit" on eBay if you want one.
I had recorded a few other videos, but this was the only one I was happy with. I might upload something else later.

clock