If you are looking to spice up your bookmark experience, no one is better equipped to hold your page than a superhero. I made these bookmarks out of craft foam. Feel free to adapt them for yourself.
Iron Man (Red and Yellow craft foam… and if you overlap the colours, he can perch at the top of your book)
Blue Batman (Blue, White, Black, and Yellow craft foam. You can glue only the top of the bat symbol and leave the bottom of the symbol unglued so that you can tuck the page into it to hold your place)
Black Batman (Black and White craft foam)
Superman Bookmark (Blue, Red, and Black craft foam)
These bookmarks are extremely easy to make and you can make them out of craft foam as I have done here or you can make them out of cardstock (which is a bit thinner). I have used a minimalist look here.