clear glass bulb (Michael's or any craft store)
sand and sea shells (optional)
twine or ribbon (optional)
any other embellishment you can think of.
I started out by using this tutorial to print mini poloroids.
I poured a little sand into the glass bulb and added some tiny sea shells. (which we had saved from Siesta Key beach)
Gently roll the photo (like you would a treasure map) and insert into the bulb.
Use tweezers to maneuver everything how you want it. I also used the end of a skinny paint brush to help move and flip things.
Add fabric or washi tape (in my case fabric tape) around the top and you're done.