I hadn't until I heard about Plastic Nee-San.
The show is very silly and random and pretty darn entertaining. It's about three girls who are in the club where they build models like trains and planes and such. Since each episode is only a few minutes long there's no real story and it's all about the humour. Fearsum4sum does a good job of explaining it in his video here.
The entire series is only about a half an hour long so if you have some time to kill feel free to check it out!
Here is the entire anime summed up in one image.