Knex, it is similar like lego, right? I only got one basic / small knex toolkit in my childhood. What is your opinion: what differentiates it from e.g. Lego? Th

Knex, it is similar like lego, right? I only got one basic / small knex toolkit in my childhood. What is your opinion: what differentiates it from e.g. Lego? Thanks for the hint!