Pictographs are a fun way to represent data. This Powerpoint starts out with the basics but quickly moves into some higher level thinking with these graphs. It included adding, subtracting, half of symbols, and even has some practice with a t chart. :)
I used this with my students to start our unit. Next, they made graphs with fruit loops. Finally, they polled other their class, and later other classes, which made the key grow larger and larger. We had a blast, hope you do to!