What are your favorite play based learning activities you have used with your students?

What materials do you have in your classroom for your students to play with? We end our day with Discovery time (free play) and I am always looking for new items to add, the more open-ended, the better!

I am searching for some new dramatic play themes for my kindergarten classroom this year. Any suggestions or ideas I should try?
I have already decided that I will add in:
-coffee shop
-weather station
-garden center