I bought these cubes for my daughter when she was five months old, she's loved them since day one (she's now eight months old). She enjoys spinning the silver dial especially. I'm sure when my daughter gets older she will enjoy stacking the cubes and pressing the top button, for now, she's happy for us to do it for her and loves watching!
These cubes are very appealing for baby and parent alike and are highly recommended if you want a simple, non-battery operated toy to keep your little ones amused for hours!