To add more terrain to your playground an original choice could be a billboard. It is easy to build: a flat vertical surface with a couple of poles to carry it. But I found a more sophisticated billboard by Pardulon, with a metal structure as poles, bolted to a concrete base.

Another view, from behind the advertise.

It has a 8x5cm surface that can be magnetised with strips. So, using metal card as base where to glue paper posters, you can change message and feature.

I made 10 posters using font icons and downloaded images, all elaborated through Photoshop and printed with a normal printer at 300dpi. They are themed for the future games that I will play. I’m thinking to do the same thing for posters to add to external houses walls.