Do you have a binary clock?
Do you use it in your classroom?
Here’s an activity you might try with your students.
Intead of focusing on the time initially, see if students notice when interesting shapes show up in the pattern of LED lights.
This next image looks like football goalposts to me. Would you agree?
How about this pattern as a house?
This next one looks like a small dog…maybe if you squint.
There’s an Inkscape clock blank to do your own shapes.
There’s a worksheet you can give your kids to try figuring out their own interesting shapes.
Get some more details at http://runeman.org/articles/binary-clock/index.html