These bookmarks were made as gifts utilizing the M1.

The first design is basic, and easily used on the machine (the heart shaped one with an engraved letter). 
The second design is more complex, utilizing some tricks through the software to accomplish some interesting effects.

I do not suggest you do leather unless you are utilizing both an air assist (to reduce the amount of crap you have to wash away) and an inline fan (to reduce the smell... it's not great. If you've ever smelled a cattle brand being done, you'll understand).