Offtopic, does anyone know a good app for video editing which kids age 8+ can use? I'm thinking of normal film editing, but perhaps a stop-motion capability would be nice, so they can animate their LEGO figures :)
For stop motion animation, there is an app called just “stop motion” which is pretty good. It is free, but there are some in-app purchase upgrades that may be worthwhile.
We like to start kids off shooting 2D scenes, with the camera up above the table. You can balance your phone on a stack of books for free, or for about $35 (IIRC) you can get a gadget from amazon that is like the arm from a clamp-on desk lamp, but with a selfie-stick-style phone/tablet holder instead of a lamp. Either way, I recommend grabbing the earbuds that came with the phone/tablet and plugging those in, because you can use the volume buttons as a shutter release that won’t jiggle your whole set up.
(Both iMovie and Stop Motion are available for iDevices of all size. I don’t know what is available for Android, but I am sure there are options.)
Apple has a habit of adding and removing and re-adding features to its base programs, so I’m not sure if it’s still available in Mojave. Might be worth a check.
Six year old kids can do amazing things, as long as their environment doesn't railroad them down boring paths.