In large bowl; combine brown sugar, sugar, and margarine; beat until light and fluffy. Add vanilla and eggs; blend well. Add flour, baking soda and salt; mix well. Stir in oats and chocolate pieces. Cover with plastic wrap and refrigerate at least one hour.
Heat oven to 350. Lightly grease cookie sheets. Shape dough into 2-inch balls; insert wooden stick into each ball. Place 4 cookie pops on each greased cookie sheet; flatten to 1/4 inch thickness. If desired, press additional candy coated pieces into the top of each cookie.
Bake at 350 for 8-12 minutes or until light golden brown. Cool 2 minutes and remove from cookie sheets.