1. Go to bbcoupons.com and search for Duncans Toy Chest.
2. Select a promo code that best suits your purchase.
3. Click on the "Get Deal" or "Get Code" button to reveal the code.
4. Copy the code and go to the Duncans Toy Chest website.
5. Add the items you want to purchase to your cart.
6. Proceed to checkout.
7. Enter the promo code in the "Promo Code" field and click "Apply".
8. The discount will be applied to your total order amount.
9. Complete your purchase by providing the required information and payment method.
* Note that promo codes may have expiration dates and certain restrictions or exclusions, so be sure to check the terms and conditions before using them.