It's a joke - I don't actually have kids. And I mean the 2nd sentence seriously....

js8 on June 2, 2017 | parent | context | favorite | on: 4D Toys: a box of four-dimensional toys

It's a joke - I don't actually have kids. And I mean the 2nd sentence seriously. Also, quick googling reveals that 4D printers haven't been invented yet, so presumably one would need a KS for those first.