It only requires a few simple supplies.
The trick is selecting eggs with little holes in them. I found these at Target. Then you just thread some twine through those holes...
Position the egg where you want it on the twine, and tape it in place. I used washi tape, but regular tape would work just as well.
Make your garland as long or short as you want. For added fun, fill the eggs with lightweight treats (dollar bills, y'all) that can be opened on Easter. Quick, over-easy and fun!