Create a mixture of half glue and half water in a small bowl.
Cut long strings of yarn and soak them in the bowl of glue.
Blow the balloon up to the size you want the egg shape. The smaller, the harder it is to fit treats in, so try to make it bigger than fist size.
Pull one piece of glue-soaked yarn out at a time, using your fingers to remove excess glue.
Wrap the yarn around the balloon from top to bottom and side to side, until the balloon has a great egg shape.
Leave a larger gap in the bottom of the balloon that you can pull apart to fill the egg later. Once the yarn is dried, you can play with the shape of the egg.
Pop the balloon the next day to remove. While the balloon shrinks, it might take the shape of the egg with it. Don’t worry, you can pull the egg back out once the balloon is gone.
On the bottom, stretch the gap you left a little further to fit Easter grass and candy inside, then pull the yarn back to close it.