Community helpers are a common topic for preschool and kindergarten. Arguably the most popular are firefighters; give them a call and see if they can come to storytime to talk to the kids, and to show them the fire truck.
For a craft project, try: enchantedlearning or dltk-kids.com.
Sis, Peter. FIRE TRUCK. A little boy imagines he is a fire truck!
Bond, Felicia. POINSETTIA AND THE FIREFIGHTERS. A little pig calls the fire department when some power lines start a fire outside her window.
MacLean, Christine. EVEN FIREFIGHTERS HUG THEIR MOMS. A boy imagines several careers he could aspire to, including firefighting.
Hamilton, K. R. FIREFIGHTERS TO THE RESCUE. A day in the life of a firefighter, from cooking at the station to rescuing a pet.
Hubbell, Patricia. FIREFIGHTERS! SPEEDING! SPRAYING! SAVING! In this dynamic book, lots of sound words describe what is happening during a fire.
Rey, H. A. CURIOUS GEORGE AND THE FIREFIGHTERS. While on a class field trip to the firehouse, Curious George ends up going on an emergency call!
Fox, Christyan. FIRE FIGHTER PIGGY WIGGY. A pig daydreams what it would be like to be a firefighter.