This is such a fun project even though it can be a little messy, it's definitely worth it. These balls of light can be used indoor and also outdoor because the glue is interior/exterior glue.

Shopping List:
1) twine
2) elmer's wood glue exterior/interior
3) balloons
4) plastic bowl to hold balloon
5) scissors
6) rubber gloves (optional)
7) small led lights (target)

Follow steps below:
Wrap the ball with twine dipped in glue (you can use rubber gloves here). I like to cut the twine into 4' pieces because it's easier to wrap around the balloon without getting tangled.
Let the balls dry for 24 hours. I like to hang them from a shower rod.
Pop the balloon inside the ball with a scissors. Remove the dried glue that is not attached to the twine. This part is definitely messy, it's a good idea to have newspaper or a trash bag under the ball.

Once the ball is cleaned off you can add the led light and then hang! You can hang them inside or outside on a patio or porch.
Enjoy!