So when I was 5, my dad would drop me off at my grandmother's house so he could go to work (both my rents worked, so there was no-one else to watch me). And I was always really excited because she could make some awesome food for lunch. The only peculiar thing I noticed was that she always had lunch at exactly the same time (11 o'clock), everyday, and shortly after she pricked her finger. She'd then take some medicine.
Now, for whatever reason, she only ever went by this one cuckoo clock she had in the living room that had an open face with a glass door where you could set the time. When it hit 11, the alarm would go off, she would prick her finger, make us lunch, and I'd get some of the best food I've ever had. So, for the longest time, I would wait until she left, and would open the face of the clock and set it a few minutes before 11 so the alarm would go off. Without questioning, she would go through the very same process I had always seen her do before -- prick finger, fix food, take medicine.
It wasn't until I became an adult did I realise why she did that at the same time everyday. My grandmother was diabetic, and I was making her take her insulin pills 1 to 2 hours ahead of time. Thankfully, nothing bad ever happened to her. She passed away a few years ago from Alzheimer's.