Every time you spend $100.00 on Baby Bucks products during a cycle, you’ll automatically be rewarded with a $10 Baby Bucks Coupon at the bottom of your register receipt. Use your Baby Bucks coupon to buy any products in the store except those prohibited by law, with a minimum purchase of $50. Baby Bucks points are reset at the beginning of each cycle.
Baby Bucks Coupons expire 30 days after the cycle end date and any unused points at the end of each cycle period will be reset back to zero.
You can read more about it here.