My sister had wanted a hacky sack and since I was making it, I just wanted to share :) Hacky sacks can be great stocking stuffers since Christmas is right around the corner ;)
I started out by printing out a template (rounded triangle) on card-stock paper (I printed different sizes just in case). This will be one of the four sections of your hacky sack.
I cut out my template and traced it four times onto some felt-fabric.
Then I sewed the four pieces like this :) I love this diagram (got it from here). More details on how to sew this can be found at that same link.
Hacky sacks can be filled up using many things but I used white sand and filled it up through the one side of the triangle I did not sew.
These were pretty fun to make and I was surprised at how short of a time it took to make each one. These are so addicting I might try making ones with more panels :p