actually, it was spy-kids 3d that forced me to make a couple pair the last time! we rented the 2 disk dvd from blockbuster only to discover that there were no glasses in the case. When I called the local blockbuster, they said, yeah, none came with it! I was not amused and pretty suspicious, but the only choice was to return the dvd or... make some glasses. So I did plan 'B' and it worked out fine. But now they are gone, alas..