Cool idea on making your own reveals. Here's what I came up with:
-Product logos
-Chewing gum packets/candy wrappers.
-Business cards
-Coupons
-Money maybe
-Here's another:Wallet sized pictures. If you have a picture of you or someone in your wallet and the background has some writing in it, (like billboards, road signs etc.) then maybe you can edit that writing for a really cool reveal.
Those are some of the things I came up with just now and unfortunately I don't have the means to create the images but i guess you see what I mean by those. And now that I think of it, cards aren't the only ones that you can reveal. Maybe you can do the same for dates and initials too. Hope this helps