The Tenth Dimension
From: Imagining the Tenth Dimension by Rob Bryaton
Although this view of ten dimensions is not the like the 10-(or even 26-)dimensional spacetime is viewed in string theory, this video nicely shows the concept of higher-dimensionality, understandable to even the non-scientifically inclined.
Speaking of the still not proven string theory, the space probe Planck, due to launch in October this year, might even see a shadow of extra dimensions.