No helium needed to fill balloons for parties.....just vinegar and baking soda! i need to remember this!
wikiHow to Blow up a Balloon With Baking Soda and Vinegar -- via wikiHow.com
balloon topiary -- no tutorial, but looks like they used inexpensive poles (Lowes), and bunched non-helium balloons together (yea! saves time money without the helium), and then added ribbon. Inexpensive, secure, and no issues with helium balloons running a-muck getting tangled. It's also long-lasting.
Fun pinata alternative. Fill balloons with candy and throw darts. SO FUN!
Balloon Ideas Without Helium
Idea for non-helium balloon display for outdoor areas