[color=red]How do you build your ice cream maker. I bought an ice cream maker and I requested materials from my neighbors. I still need more material. I was going through my gifts and it I saw that there was material that I needed to use for my ice cream maker. So I pressed on the gifts that I needed and it told me that I couldn't use it because it is a constructible part and it wouldn't let me use it. So how do I "unlock" those parts so I can build my ice cream maker?