This book was found in the children's section at my library around 1985, although it was likely older than that. A group of three or four (or more?) siblings have magic or psychic powers. I believe they can all move things without touching them and maybe fly? I think I remember two scenes: 1) the children were flying in the living room and broke a vase. They used their powers to clean up before mother saw. 2) Villians have followed the children to a movie theater. They escape by crawling under the seats.
Thanks for your efforts!