Weird experiments

I saw a clip of a guy showing a card that changed its text or picture just by moving it. My guess is that he was using lenticular film on the card, and that is a great idea. Possibly. It might also be completely obvious to everyone else watching, at least in good lighting... So I want to make my own prop like that with something funny written in Japanese. I went around to a bunch of stores that might sell this kind of stuff, but none sell lenticular film... But I did find post cards with such film, so I bought one and started peeling off the back. Not the smoothest way to make props, but it should be enough to make a first prototype at least.

動画で、カードに書いてある言葉（や絵）がカードを動かすだけで変わる不思議な現象を見た。レンチキュラーフィルムをカードに張ると出来そうだと思った。賢い！けど、すぐばれるんじゃないかと心配している。光のいいところだったら、見えると思うなぁ…だけど、作ってみたい。色々な売っていそうな店を回ったがレンチキュラーフィルムを売っていない。そういう絵葉書はあったけど。1枚買って、自分で裏の紙を取ってみた。きれいにならないが最初の試しの道具に充分だと思うから、来週作ってみよう。