Do the road with magnetic paint and add magnets to the cars...I would do the entire wall with magnet paint. You can paint one 1/2 will green for land and add magnets to people, houses, animals. Put the road down the middle with cars. Then other 1/2 blue for the ocean and put magnets on boats and sea life. This site has lots of other ideas for kids rooms too.
DIY: Kids Art Display. Cute idea for room!
Genius Idea! From her blog she writes: "I got an alphabet poster for a teaching store and used rubber cement to paste it to the metal. The oil pan had a grease coating on it which came off with SimpleGreen. I didn't want to put (or try to put a hole in it for hanging) a hole in it so I use the 3M picture hanging velcro. It worked Famously and at only 22 months old! When the master the alphabet, I hope to make a new board with phonic sounds."