My daughter just had her birthday and we made an effort to green it up as much as possible... here are some of the things I did...
1. Asked a friend to pass on her Princess Decorations after her party - so at least they are used more than once. Now that our party is over, I will offer them up on Freecycle and then at least 3parties got to enjoy the princess decorations.
2. Goodie bags made from recycled paper and reuse ribbon.
3. In the goodie bags - I gave the girls a glass beaded bracelet...one they could wear into adulthood - one that shouldn't break anytime soon.
4. I requested no gifts on the invitation... and while virtually everyone ignored my request, She got hand sewn clothes, and beautiful hand crafted picture wall hangings, and while my friends gave me a hard time for writing that on the invite, they were definitely greener in their gift choices. (keep your gift bags and tissue and use them again.)
5. I emailed the invitation... and I have to admit this didn't work perfectly - so I would encourage you to use Evite or send it as an attachment - not embedded in the email.
Other things you can do? Use real plates,forks and cups, or at least use ones that compost easily. (Chinet works for the plates, there are also choices for the other stuff
here... .)
Serve water from a pitcher - not bottles of water. We had a jug of juice - not juice boxes. Forget about getting balloons - or at least just get a few, and give them out to the kids as they leave.
I was really surprised at the lack of eco friendly choices at the party store - there really wasn't a green option there... so save yourself the trip.