A fun bookmark of a cat peeking over the pages. Also an easy multicolor print. This is a remix of https://www.thingiverse.com/thing:3984712 — I made the clip a bit longer and sturdier, and adjusted the cat's face a bit to make it easier to print.

If you want to print this with two colors, the cat's face starts at layer 6 (1.2 mm). If you are using Cura, you can add a filament change to your print using: Extensions > Post-Processing > Modify G-Code > Add a script > Filament Change (see screenshot for example settings).

I'd also recommend using the concentric top/bottom pattern in your slicer. It creates a nice effect with the print lines matching the shape of the object.