Fishing line can be used to 'invisibly' hang things, tie things down, and attach objects. You can also use it for a ton of other stuff! Check out these projects with fishing line to get some ideas.
Survival Bracelet With Fishing Line
by blacky94 in Knots
Backyard Fishing Line Zipline
by Dilong_paradoxus in K'NEX
Cheap Universal Fishing Line Winder
by id.steelheader in Fishing
Easy-to-make Fishing Line Stripper
by gadabout55 in Fishing
Keep Fishing Line From Getting Tangled in Your Tackle Box
by Catfishing in Fishing
Build a Hand From Zip Ties, Cardboard, and Fishing Line.
by jaesn in Assistive Tech
How to Make a Fishing Can
by 11richie21 in Camping