What are the items you put inside a party bag without costing a bomb? I am planning a birthday party for 40 kids in pre school. Appreciate your input.

I normally will buy art and craft stuffs to put in the goodie bag. Qoo10 sells these at less than $1 for sand art. I buy organic lollipops also from iherb. They sells those in bulk too. U can also take a look at Aliexpress, if you can wait for a month or so for shipping they sell toys for less than $1 too.