If your mom says to get ready to play at the beach, she means with a boat, or a Frisbee, or a shovel. She is NOT talking about the piano.
Magnolia is a little girl with a big idea, determination, and one very heavy upright piano that, she insists, she needs to take with her. What's the worst that can happen? In a riotous series of mishaps, Magnolia quickly learns that--not surprisingly--a piano doesn't mix well with sand, sun, and seagulls!