Stutter affecting little kids?

Stutter affecting little kids? I have a part-time job as a preschool teacher. I have a pretty mild stutter, but the kids in my class are all aged 4-5 so they're still learning how to speak clearly and properly. They sometimes have to ask me to repeat stuff for them because I slur my words or stammer on them, especially since I'm doing a fake accent for them (American, so that I can seem like one of them). Will this adversely affect their speech development? Or their speech patterns? I'm a little concerned for them.