Anonymous wrote:At a recent bday for that age group, balloons were surprisingly the big hit (so simple...who would have thought?) as well as Squishies.
Balloons are beautiful and popular and I love them, but got in trouble recently because I didn't realize how bad they are for the environment. Helium shortage + plastic pollution. So skip balloons

The sturdy blow-up punch balls at least avoid the helium issue, if not the plastic, and look cool hung like decorations.
Best party favors are the ones with a single item and no bag. My kids have loved:
Crayons (one party had the 64 color boxes, which got audible gasps from the kindergartners or first graders, can't remember which year)
Fancy gel pens
Matchbox cars
Wooden things to paint (one had boxes, one had ornaments)
Kleen kanteen small metal water bottles (these are expensive, but the party was small. Still in use 5 years later! Would not use the plastic ones.)
Soccer balls (real ones, not blow-up, but smaller sized. I imagine these were expensive, but awesome)
Deck of playing cards
Invisible ink or Mad Libs books