I saw Magic Journeys as a 18 month old in Epcot and many times at the Magic Kingdom as a young child. The 3D movie about a child's imagination was a perfect fit for the pavilion, with the original (wonderful) Journey Into Imagination + Image Works. Journey Into Imagination was a colorful, whimsical and dreamlike journey, in the same way that Magic Journeys was a colorful, whimsical and dreamlike -ahem- journey. ;)
You can check out some clips of the film here (they're not the highest quality recording ever but still worth viewing I think!). Yes, it's a little 1970's trippy, but it was beautiful and I always enjoyed seeing it. I miss it even though I am quite confident they won't bring it back like they did Captain Eo. Oh how I wish they would!