maximum value for your money, with volume control!

It has already been said many good things about this device. I can only confirm this. One should not expect miracles in the price with regard to the sound, but for a child aged 3 to 6, it should fulfill its purpose.
Contrary to other comments, my machine has two buttons to adjust the volume to change. In the apparatus which is shown here at Amazon (at the time when this message will be written) also has this (blue) buttons "Volume up" and "down".
I just think it's strange that on the package is "contained batteries for testing purposes only." If they are empty tomorrow I know why.
Overall, a great toy for small children.