Both my kids (now 9 and 14) started at 5 with a Ruger Single Six. It was me cocking it and helping with holding it for them while they aimed and fired.
Tried various rifles over the years, TC Carbine w/Youth stock, Stevens Favorite, Daisy 2202 with adjustable stock.
This summer I acquired a couple of Sportsters in .22, one with Youth stock for my 9 yr old son, and one with adult stock that 14 yr old daughter used.
Also have a Henry .22 lever and Marlin 39 Mountie. Both of these the kids loved, though my son found the stocks a bit long. And it was a toss up which they enjoyed more.
My son ended up shooting the Youth stocked Sportster most of the time, with a 4X Simmons scope. The more he shot it, the smaller he wanted the targets to be. Finally he was shooting popsicle sticks at 30 yds, trying to split them in half.
My daughter shot the Henry more than anything else, and like the old west feel of it.
We fired a couple of thousand rounds of Colibri through all these guns, at a friend's rural property (we had about 30 yds) and never shot a single paper target. (Well I sighted in on paper, but after that it was all 'reactive' targets - balloons, cans, plastic pill bottles, plastic dinosaurs, animal crackers (though I tended to eat many of them before they had a chance to become targets!)
Most fun were cans from a case of Diet Pepsi we found that had a 1996 expiry date. Left them in the hot sun, shook 'em up and let fly! Yeee-ha!
Anyway, we also had some airguns, and the Colibris were quieter than the CO2 (Crosman MK1 and Crosman 1077) and about the same noise (maybe a teeny bit louder) as the break barrels.
I think that noise and 'frustration' are probably the biggest factors in kids not enjoying shooting. Frustration in the sense that they want to hit something and see a response. That is why we didn't shoot any paper this time. It has been 3 summers since we last shot together, so I wanted to maximize the fun!
I would say it was the most enjoyable my kids have had in their shooting experiences to date! It certainly was in my shooting experience with them.
I only get them in the summer, they live with their mom, far from me the rest of the year... and we haven't managed to go shooting together for the last couple of years.
My son is also an awesome shot - for a 9 year old - with a handgun. Shot the Crosman MK1 and a single action Colt revolver like he was born to it. The single action made more noise with the Super Colibri, so we used the lighter version Colibri in it.
So, anyone concerned about noise at the early stages of shooting with kids, try the Colibris. They are accurate at the ranges we were shooting and accurate (certainly 'minute of can') in all the guns we used this summer.
In any case, I love shooting with my kids and though it is awkward to take them hunting under current living arrangements, it is my intention within the next couple of years to make it happen.
Cheers
Kerry