This really is a Hail Mary throw, but its been bugging me for years.

I watched a children show in the 1980s which revolved around an alien presence giving advice and other interaction to a small group of children. The alien was represented by several flying discs which took up positions in a barn when called by the children - one of the signature shots was the discs traveling at high speed through a tunnel to get to the barn.

I have no further details I'm afraid.