If you've ever wished you could draw in three dimensions, you can with a 3D pen that writes with melted plastic. The grown-up version of the 3Doodler has actually been out for quite some time now, however company has just recently announced the 3Doodler Start which is designed for kids. It seems to have all the functionality of the original, but without the exposed metal parts that would otherwise burn your fingers.
Like Spirograph and Lego, products like this are great because they give kids and adults the virtually limitless freedom to create. It won't be surprising to eventually see every kid grow up with one of these and artists specializing in this type of medium. I suspect that it won't be long until we see commercials for it and adults rushing to stores to get them for Christmas.