I hate it when I snap a baby into an outfit, only to have it come unsnapped as soon as they wiggle a bit. Freddie is wearing the cutest little pajamas, so warm and snuggly soft - except that his entire right leg is poking out through the snaps that didn't stay snapped.
I wish I had known that loose snaps are fixable! Here is the easy solution. You convince the snaps to behave themselves with a hammer. I am not kidding. Do not try this method on your children.
image from Wikipedia, where I learned that snaps have been around in some form since at least 210 BC, and were first patented in 1885!
All snaps have two parts - the pokey-outie (head), and the pokie-innie (hole). We want the pokey-outie part. Place the snap, flat side down, head side up, onto a hard surface. Give it a few gentle taps with the hammer. That's it. Easy.
When snaps don't stay snapped, it is because the head isn't big enough to fill up the hole. Tapping it with a hammer spreads the top of the head back out, and makes it stick - and stay stuck. Problem solved.