Looking at putting some learning apps on an old tablet to keep our 3yr old entertained on a flight.
Tablet is basically brand new. Battery life is good. But its old and running Jelly Bean OS.
Also, was looking at putting VLC on it. Found older VLC.apks But its asks if it's and ARM processor and what type? How do I tell?
Whatever apps are still supported on Jelly Bean will be available on the Play Store.
There are apps that will tell you this information, search the Play Store for 'hardware info' and one of those should be able to tell you. If not, and you know the model of your tablet or the processor, you can Google it.