In a large bowl, stir together the oats, peanut butter, honey and vanilla until well combined.
Stir in the chocolate chips and M&M candies.
Roll dough into 2-tablespoon sized smooth balls and place on a parchment-lined baking sheet.
Place in the refrigerator for 30 minutes or enjoy right away.
Once the balls have set, transfer them to an air-tight container and store in the refrigerator for up to 2 weeks.
