Stop and think about the last time you struggled with getting a "childproof" pill bottle open. Now look at this 1890 advertisement for Ayer's Cathartic Pills, which makes pill containers look like a giggling wonderland for naked toddlers to frolic in. "Hey, look, Steve brought a huge stick of butter! Ha-ha, the old days are frickin' rad you guys!"
By the way, if you don't know what cathartic pills are or why it's a terrible idea for children to take handfuls of them, let's just say they uh, evacuate the bowels, which is not particularly something that children or babies need help with. And if you're giving them out in the copious amounts you see here, you might as well give them a non-Iver Johnson revolver to play with.