I have been making Spiderman and alien masks for dress up for my DGS, who is 3 1/2. How that came to be my project is: We were visiting at DD's home and I saw that he had a paper Spiderman mask. I thought, "oh, that won't last long." So, wanting to be a good grandma, I made a tracing of the mask and came home and went to work.
So, I bought used t-shirt at a thrift store and craft interfacing at Joann's. When I cut out the first Spiderman mask, I said to my husband, it looks like an alien, so I got green t-shirts and made some of those, too.
They came over and DGS and I put them on. DSonIL said, "Oh, my gosh! Look there is Spiderman and an alien! Where is DS and Grandma?! I want them to see this!"
DGS and I turned around, took off our masks, and turned back around, and asked, "What is going on?"
They told us about seeing an alien and Spiderman and DGS giggled and said that we had a secret. We did this repeatedly.
So, since they were a great success, I have been making more, to put aside for future use. (DGS's daycare does an auction every year, to buy equipment and to not have to raise their rates. So, I will probably donate a set for that.)