Goddie bags kids 5-10 years old

I need to make goodie bags for my daughter's cousins. I have around 20 kids that age. I don't have any ideas of what's appropriate. Do you put candies also? Will you give goodie bags to the older kids 12-13 yo? I have 4 kids that age coming. Sorry I'm so clueless but this is my baby's 1st bday and also my first kid's bday 😂.