UFO Sighting in Schaumburg, Illinois on June 6th 1976 – I was 8 reflective liquid like sphere went over my neighbors house at tree top level

I was 8 reflective liquid like sphere went over my neighbors house at tree top level it didn't make a sound. It was floating casual glide. I pointed it out to my friend across the street and then it started to move up but still floating. We followed it on our bikes till we ran out of road and found our selves on a large hill made by construction companies for new homes. At that point the craft was very high in the sky where it joined or we could see 3 objects in a triangular formation they stopped for a second and started down again then they moved in a slight rotation and started floating away and up again and in an instant they shot up into the sky.