Mix peanut butter, sugar, butter and graham cracker crumbs together until they can be formed into balls. (If the peanut butter mixture is too sticky, add more graham cracker crumbs). Roll into small balls. Melt chocolate almond bark (melt it in the microwave) Dip peanut butter balls into chocolate & cover them. Put them out out on wax paper to harden. Keep refrigerated until serving. Eat & enjoy!