When my Kids were about 3 or 4 they both asked why
I was hurting my fingers(while testing). I just told them
because I had Diabetes and I had to know how much
sugar was in my blood. I figured that they didn't need
to worry about Mommy at that young of an age. They
just said, "Okay" and that was fine.

I used to get those fast glucose drops, when it feels like your
heart is pumping so fast that it's going to explode, I had to lie
down on the cool floor. I found this caused the dropping
process to slow down and it relaxed my body 'til I felt better.
Thankfully, that hasn't happened to me in about 4 or 5 yrs.

Anyways, my Son came running down the stairs one day and
asked if I was okay and why I was lying on the floor. He was
about 7. I told him that I didn't have much sugar in my blood
and could he get me a juice box, please.

From then on I explained to him (and to my Daughter yrs. later
when she was about the same age), about Diabetes, about really
being tired when my sugar was low, about possible seizures(he
knew what those looked like since my Daughter had fever seizures)
and how he could help me.

I already had the list of numbers and names of Friends who lived on
our street, stuck on the fridge to call in case something Bad happened.

I explained about quickly getting me a juice box and or chocolate bar
(that's what works best for me)and how many scoops of sugar to mix in
a glass of water in case we were out of juice.

If I didn't answer him, that mean't he was supposed to call 911 and tell
the Person on the phone to send an ambulance and to answer their
questions and don't be scared, I'll be alright. Then call Daddy.

I told him to unlock the door when he heard the ambulance siren.

I told him not to leave the house and to bring his little Sister in the same
area as me and to look after her whether I was not able to talk to him or
if I just needed something sweet.

There was more but that's all I can think of at the moment.