DLTK's Crafts for Kids
Transportation Crafts

Thanks to Tamara for the following idea:  Also another idea for the transportation section: we picked up a bucket of primary color foam shapes yesterday and used squares and circles to make a train. (two medium and one small square on top for the engine; two medium squares for a coach or freight car; tiny circles for wheels and gradated circles for the smoke plume. Connected the cars with little bits of yarn and painted black tracks. All glued to a long narrow piece of tagboard. (you can probably tell that at the moment, Will is not much interested in anything "un-train" so we're doing alot of those types of things lately! :o) ) But this is good for practicing colors and shapes and sizes for preschoolers---anything from "I need a square." to "Can you find me a red circle?" to "Look for a (big/little) purple triangle." Depends on the development, skill and attention of the child. Can also point out that combining shapes makes other shapes such as two squares make a rectangle. Foam shapes are a great sorting activity so it's fun to have the bucket full and Will thinks that shapes are pretty cool anyway and just loves to play with them! AND they are more durable than the paper kind so more reusable after being knocked around by an active 3 year old!
See more of "Mama and Williams" great craft ideas at Mama and Williams Crafts

Note:  if you're having trouble imagining a train made of shapes, click here for a picture of a shapes engine to color