I've been making booties. They are easy. I can get 1 1/2 pairs done in an evening quite easily. When I look on Ravelry, there are so many nice ones that I want to make. Here are 4 of them - all different patterns.
These top three were made from sport/DK weight yarns. They have a nice fit.
This pair is from a worsted weight yarn. It might be better in colder climates. Cold winter climates, not cold summer ones like we have.