I am contemplating using the free pattern at Simplicity, it's part of their Sewing 101. I would be simple and quick to make for the pajama sewalong.
It's a simple pj pant, in Misses', Men's and Teens' sizes.
Basically x-small, small, medium, large and x-large.
How can you beat a pattern that is simple and has only 2 pattern pieces!
Not sure about sewing a top as of yet.
Now if I could only find the fabric before Thursday.