The Canuck quickly forgets that he is as safe as he is because of Big Brother (we Americans who are "too much").
I have a 3 year old and 6 mos old and have found a solution that works for us for now... At night, out and on the nightstand. Dry fire, load mag. He's not even close to strong/coordinated enough to rack the slide (we have him try monthly and it doesn't budge).
We hit the range enough to feel comfortable racking the slide as the alarm gives us time to "come to".
For grip consistency/feel, I put small pieces of grip tape on the contact points of my strong hand so I know that my grip is safe, most importantly a pea-sized piece at the index resting position. Every time I handle them (19 & 26), my finger is indexed in that spot so hopefully muscle memory is well trained!
I also picked up a biometric safe (LockSafe Biometric Pistol Safe by LockSAF). While I will use this as the means to keep kids out once they are a little older, I certainly would not trust it or myself in the middle of the night.
I guess the short answer is [safe] practice, [safe] practice and more [safe] practice!