Estimation Jar

We have been loving Finn's new preschool class at Concordia. Since Mrs. Coogan mentioned it during Open House, I've been waiting for the Estimation Jar to come home.  An empty jar that Finn would need to fill up with objects, then bring back to school for his classmates to practice estimating.  Today Finn brought it home.  Jason and I both were inexplicably excited.  After first trying to put his tools in the jar, Finn settled on cars as the best option. 

Can you guess how many cars are in the Estimation Jar?