Math A Tree Diagrams -  Are All Arrangements the Same?

Students often wonder if the order in which a tree diagram is built is important.  

Let's discover the answer to this query:

Group students in pairs.  Each student is going to draw a tree diagram for the same event, but they are not going to build their diagrams in the same order.  

Example:  Show the sample space for tossing one penny and rolling one die.  (H = heads, T = tails)