Popular I Know Many Years Ago,

many homes had a pin board,

I am not sure if such a thing is now used in modern homes,

but if you do use pin boards here are a few unusual pins,

 Tokyo-based industrial designer Duncan Shotton is known for his unique approach to houseware and stationery design, where he takes common objects from pencils to bookmarks and conceives of a novel twist, His latest creation is a series of push pins designed to look like the solar system called Planet Pins, 

the set includes the 8 planets and an optional moon pin cast in concrete, Planet Pins just launched on Kickstarter and 100 sets are available as a signed limited edition, and no I am not on commission, I just thought they looked neat, and if you have to have the set you can even compliment the 8 planets by making the 9th, Pluto yourself.