We've been collecting little wooden cars and trucks ever since Danya was a baby. There's just something about wood. At Michael's craft store the other day we found all kinds of kits for making various wooden vehicles all on sale for a dollar a piece.
So we got a couple of boats, a submarine, a tank, some airplanes, and a few others. The next day Daniel let the girls paint a boat and a car. We still haven't glued them together yet. They make fun art projects. When they are finished we will find some water and let them try out their boats. It should work. Wood floats, right?