Beech wood frames the case and MDF forms the body, giving this 18-key piano real weight on a table and a solid feel under the keys. The keys are cut narrow for small fingers and press easily, so a 3-year-old gets a clear note on the first try rather than a dull thud. Rounded corners and a smooth painted surface make it safe to leave out on a playroom floor. A music stand slots into the top and lifts away when sheet music is not in use. The piano measures 11.5 by 9.5 by 3 inches and weighs 3.9 pounds, small enough for a bedside table but solid enough to stay put while being played. It runs on 4 AA batteries, which are not included.