Too bad the "peaks" are plastic. We would have appreciated the wood until the end ... it spoils the overall impression, and suddenly the idea of resistance over time.
Develops logic, observation, learning shapes and colors.
A however advise over 2 years. Working in early childhood, I find it too complex for children.
The combination of the number of peaks + + turn it up too many simultaneous data to be taken into account for less than 2 years.