If you manage to install decent apps in time, you can use these as e-readers or video players. But batteries will eventually fail and all what you'll have will be a fancy fragile chopping board.

I was gifted with iPad 1, Air 1 - first won't charge for 6 years now and data I didn't synchronize are gone, second one needs a serious "warm-up" before charging and while Apple released 12.5.8 in the end of January, it won't get any new apps.