Too loud. Too hard. Buttons don't depress easily or distinctly. My 6 month old has fallen headfirst onto the cube and has cut her forehead and chin and jaw on the hard(!) unpadded edges. The corners have sufficient covers but why not the edges between corners??? Buttons require too much strength to push for a 6 month old. She can sometimes manage it her feet if cube is braced against other object. Definitely NOT for under 1 year olds. Battery replacement requires screwdriver.Munchkin Mozart Magic Cube