This interactive Smartboard lesson is a GREAT way to introduce your students to probability. The first few slides define probability and introduce your students to the terms: likely, unlike, certain, impossible and equally likely. The activities that follow the "lesson" include:
-tallying a 4 color spinner
-tallying heads and tails on a quarter flip
-guessing the outcome of the sum of dice (this is my favorite one since some strategy is involved) There is a slide that shows all of the possible combinations for sums 2-12.