Physical puzzle versus digital puzzle app

Yesterday, my lovely wife talk to me. She wants to buy a little puzzle for our 2,5 years son. Spontaneously, i asked her to check some on Android market.
And her response surprise me. She said she won't do that.
She wants physical little puzzle, not some digital one on flat touch screen.

Then it makes me think..
Maybe shes right..maybe too much interaction with touchscreen is bad for our son. He needs to feel and learn more about physical object. To play with, to explore with.

And, right now, i just read a great article by  tittle A Brief Rant On The Future Of Interaction Design.

He talk that touch screen interface he called "picture under glass" should not be our future because it isn't our natural way to interact with our world.

I think in some point he is right.

But i still can't imagine the better way of acquiring information, contacting our friends and packing so much data into a small form factor other than our current smartphone or tablet design and UI.

And its quite bother me..