20The relationship between kids and machines was different
This picture is from an article on Gizmodo Australia about the relationship between children and machines over the span of 100 years. It's true that in the early 20th century, it was legal for children to work. The jobs were often dangerous and safety requirements were lax.
Today, children don't usually
make machines but play with them instead. The article also points out that some school districts today even provide free laptops to students who can't afford them. A lot has changed indeed!