Great way to start the young’uns into the wonderful world of firearms ownership and responsibility 
One question about their BB/Pellet guns, are the barrels smoothbore, or rifled?, if they’re smoothbore, pellet accuracy will be marginal, but BB’s should be okay, if they’re rifled, be VERY CAREFUL putting BB’s through them, as the hardened steel BB’s will tend to “iron out” or “flatten” the rifling, turning the rifled barrel into a smoothbore barrel, making it shoot neither projectile accurately
Pellets are more accurate from a rifled barrel, as they are made of pure soft lead, and lead conforms to the lands and grooves of the rifled barrel, but they’re lead, so washing hands after shooting, especially for kids, is very important
BB’s are hardened steel, safer for little hands, but less accurate from the gun itself
I sorta’ became the “firearms instructor by proxy” to my nephew and niece (9 and 7 yr old, respectively), started 'em off both with BB guns (Daisy Red Ryder for Logan, Daisy Buck for Sage), and some fun, cheap reactive targets (cheap generic cans of seltzer water)
They both love to grab a can of seltzer, shake it up, put it on the target stand and pop the can, the .177 diameter steel BB punches through the can and turns it into a short lived fountain, wheras even the lowest power Augila Super Colibri primer-only .22 cartridge just “pops” the can open
Logan’s a dead-eye with his DRR BB gun, typically hitting the can on the first shot, Sage is still learning and takes a few shots more, then they have fun setting up the shot cans and knocking them down until the can are too riddled with holes to take it anymore
Sage really hasn’t warmed up to the whole “gun” thing, she likes her BB gun, sure, and is now proud that she can pretty much cock the lever herself, before she had difficulty, as the Buck’s lever is reasonably stiff, I would cock the gun, safe it, and hand it to her before each shot, now all I do is hold the muzzle in a safe direction for her to cock the lever
Logan’s rapidly moving past the BB gun phase, he now likes my Benjamin 392 .22 caliber multipump pellet rifle better, as it’s more accurate and he can vary the power of the shots, but what he REALLY loves are my Marlin Model 39A lever-action .22 and my CZ-452 Ultra Lux bolt-action .22
Right now he’s more on a “Western/Cowboy” thing, so the classic “Cowboy” look of the 39A appeals to him more, he also likes the accuracy, the heft, and the fun way it flings empties out of the action, he also thinks it’s really cool that the 39A is one of THE OLDEST rifle designs still in current production today, the 39A rifle is well over 100 years old (not mine, mine was made in 1980, but the actual design is well over 100 years old) and my 1980 vintage model is the same basic design as the first 39A’s made, no stupid “Nannyware-esque/Lawyer-ware” cross-bolt safety and rebound hammer, just the basic, reliable, 100 year old proven half-cock notch on the hammer, the way Og (and John Marlin) intended
Although, when he wants to play “Soda Can Sniper”, he tends to favor the CZ-452 Ultra-Lux, with it’s 28.5" LONG barrel, 4-15X scope and 9-13" bipod, loaded with ultraquiet ammo, the sound of the bullet hitting the target is louder than the gun going off, heck, my Benji air rifle on three pumps is louder!
…I think he’s going to really enjoy shooting my new/used Ruger Single Six .22 revolver I just traded a couple of unused guns for…
Hope the kids have as much fun learning the shooting sports as you’ll have teaching them, Mr. Moto
