First burn 4 marshmallows using a grill lighter (you can use a stick just like you're camping for a little authenticity).
Blend 3 scoops of vanilla soft serve or frozen yogurt , 1/2 cup of 1% milk , 1 tablespoon of cane sugar syrup (splenda is ok in a pinch), 1/2 cup of ice and the toasted marshmallows. Make sure the marshmallows are completely burned. Serve and enjoy! Your kids will only wish you made it sooner :)
Don't forget to top with a toasted marshmallow for added flavor!