Odds are you have a kid or know of one who loves Minecraft or Roblox. This is a super easy way to create some custom balloons using only tape or colored paper. If you're using tape, then just cut off a couple of pieces and add them to your balloons to create faces. If you're using paper, then you can cut your pieces and then glue them onto your balloons.
Just make sure to mix the color of your balloons up a bit in order to add some variety. But besides that, this one is super easy and quick to do.