The big problem is that the kids spend way too much time sitting on their butts with all their electronic devices.
In this case, Momma imposes some very discrete time allocations.
Our grandchildren split time between electronics devices, and actual physical playtime that includes helping grandma bake and grandpa with gardening. It's a shame if kids are only stuck on the video gadgets. They need to learn by working alongside people. One of our granddaughters is almost two and spends a lot of time creating oil paintings (one of her daddy's hobbies). Another is just turning two and is learning music, playing harmonica and piano with family members. There is more out there than video gadgets.