User blog comment:Shnopp.shniederheimer/Tips and Tricks - Treehouse of Horror XXV Event/@comment-149.216.89.154-20141010083745/@comment-25021853-20141011094025

Yeah, it seems to me that the crafting items will stay the same, but new items that can be made in the Make-a-Thing Workshop will be added as the event goes on, much as new items are being added to the shop as we go. Especially if you weren't able to collect enough probes to get the Donut Torture Device then you will have a second chance to get it by crafting it.