With orders of $25 or more, Amazon offers Prime members the Play-Doh Doc McStuffins Doctor Kit for $2.98 with free shipping. (Non-members can spend $49 or more to qualify for free shipping.) That's the lowest total price we could find by $7. It comes with three colors of modeling compound with which you can make Play-Doh bandages and medical hammer, among other items.

Note that this item is part of Amazon's "Add-on program" and can only be purchased with an order of $25 or more.