This is the "scope test" that my Dad gave me when I was twelve, I had to wait a whole generation to give it to my boys but it was worth it. In the video I test one of my sons friends, not the best scope test I've given but you get the idea. Great fun, I've gotten plenty of adult with this one too.
<iframe title="YouTube video player" width="480" height="390" src="YouTube - James Scoped.wmv
" frameborder="0" allowfullscreen></iframe>