Ask HN: How do I help my 6yr old learn robotics and coding?

My kid is fairly advanced for his age, he reads at a 3rd grade level and has been very interested and repeatedly asked me if he can build a robot that he can code to do stuff. I’m not a developer like most of you all around here so I’m hoping for some guidance if anyone has any experience. I know there are plenty of ‘coding robot’ kits but I’m not sure any of them are any good. For code, at one point I did the little flex box frog game to learn, are there any recommendations for things like that for young kids to learn programming?