This is a fun transportation sorting activity I found a while ago from Printable Share.
It can be turned into a file folder game if you print it at 50% (I think, she tells you on her page what to readjust the size to). I forgot to change the size when I printed it.
What goes on the road, in the sky, on the water or on the tracks?
We paired the activity with the Little People Transportation flap book.