Any ideas for goody bag themes?

My son is having his first birthday in July and I wanted to put together little goodie bags for the kids and wanted to know goodie bag themes that anyone else has used? My son loves Elmo so we are having an Elmo themed party but not sure if there are items to really associate with Elmo. We will have about 7 or 8 kids total. Oldest is 13 years old and youngest 9 months, all of them minus 2 are girls and one girl is 3 and the other is 9 months. I wanted to do something fun that wasnt to gender specific for all ages.