What’s In Your Baby’s First Aid Kit?

I’d like to build up a kit of essentials for my baby’s health so I don’t have to rush to the pharmacy every time something new comes up. What things do you find helpful to have in the medicine cabinet? (specifically mamas who have older babies and know what’s good to have on hand). I’m also very into treating things naturally when I can (with herbs or homemade salves, etc)

Right now I’ve got infant Tylenol, a digital thermometer, arnica, one of those bulbs to get snot out, and a few other hygiene gadgets. What else should I get?

Thanks!