Searching for a 70's movie title
I am hoping to find the title to a children's movie I saw in the 70's about 3 boys that go to a fair and request of a computer a trip to the moon. Just as they are about to be launched the computer proclaims it's a one way trip and the boys halt the launch. They the ask the computer for a round trip and it say it comes with a price. The computer wants the most beautiful thing it the world which, after a long adventurous search turns out to be a kaleidescope. I think I saw it around the same time that Erik Von Danikens Chariots of The Gods come out. Rings any bells?