The company website is almost a parody of the stereotype of serious German-ness. It is not a toy, no it is a serious learning material, so you can buy a 10000 Euro set to understand how an integrated factory is working:

https://www.fischertechnik.de/de-de/produkte/industrie-und-h...

There is a „toy“ section for children, but it is to learn about electricity or renewable energy, and I think the real customer of the page are not the depicted children, but the papa with an engineering degree.