Ask HN: Looking for stimulating and engaging toys for children of various ages

Hello hackers,

I am looking to compile a list of toys that challenge, stimulate and engage our little friends.

Whilst outdoors activities are to be a big part of a child's life, I believe that those days spent in house are better spent on activities their minds active and always curious to solve problems, and power their imagination.

The age group is from 1 to 8 for now, but happy to look into all sort of ideas.

Here are a few of them that I am aware of:

  - https://www.primotoys.com/ 
  - https://playosmo.com/ 
  - https://newmero.dk/

What else do you recommend?