One thing you can do at parties for giveaways is to send your kiddie guests with a personalized bag tag. All you will need is a printer, some paper and cutter and bag tag container.
Or, if you want a sturdier one, check out plasticprinters.com for something you can use, and maybe just have a special cutter ready to cut holes in them for the ribbon/strap.
This kind of giveaway will at least be very useful and won't gather dust. Plus, not many are doing it so it's sure to be a hit!