Most museums content themselves with advertising whatever new exhibit they currently have going on. Science World, located in Vancouver, tried something different — actually, they tried a lot of of things different, and the results are some of the greatest, most clever ads we've ever seen.

They primarily seemed to use billboards and signs, like in the ads above, but that's all. They also had an ad drive around town...

...a rather eye-catching street sculpture...

...and even free balloons for the kids!

These are just a few of our favorites — for a larger gallery, head over to Anakin SkyToad's Imgur collection here.