I have never been a fan of making models of the solar system because there is no way you can make a model large enough to see at the proper scale of distance. Thus, it sort of warps students' understanding of the vastness of our solar system-- let alone comprehension of the universe!
But I ran across these images not too long ago that really do make an impression.
If the planets were as close to Earth as the moon is, what would they look like on the skyline? Check out Saturn and Jupiter below!