I love this and wish it were a more widespread practice.

Baseline education of infant care is difficult for low income families. There's just too much to deal with.

A cardboard box will appear crude to many, especially those of higher income, but the cardboard box removes a lot of the guess work about what's allowed in while sleeping - which is essentially nothing.

Anyone who's had an infant before - there's too much conflicting information and it's downright scary because it's difficult to know what's right/wrong. I love this establishes a clear baseline.