Hi Nuria!
Glad you found what you wanted! I couldn't tell which set you had decided on, but I just wanted to mention that some of those sets have little magnets that tend to fall out with use. They are tiny and can be swallowed...I know it is hard to tell from Amazon pictures sometimes, but the ones with a solid magnetic backing are awesome:) we have several sets of the Melissa and Doug sets, as well as their numbers
Anyway, just wanted to mention it in case you haven't seen them physically...