Need ideas for teacher treats

Hello!



My daughter has been taking a Summer Reading Camp class at her public elementary school. It has been going on for 1 month from 8:00 - 1:15. Friday is the last day & I would like to buy the teachers a little treat as a thank you for spending their time this summer helping kids that are behind in reading, get some much needed help. There was not any charge for this class either.

Any ideas??

I'm not sure how many teachers there are but I would say it is under 20.

Thanks in advance for any help.

Melissa