Editing Nailed It (section)

== Demonstration ==

# Set out the parts, keeping the small nails in a bin or shallow dish. As students come up, ask them to try and stack 20 nails on top of the big nail.
# Allow students to try and figure out the puzzle. If they ask for a hint, let them know that they need to "Put some nails on a nail with a nail on top to get the nails on the nail."
# If any students figure out the trick, ask them to explain how they found the answer. Otherwise, if students start to give up, show them how to lay out the nails, and then ask them to try again to get the nails on top.