try a grounding mat too, if you can't go without. Watch that meter drop if you do measure waves... watch it spike when you stand in front of your "smart" meter.
This is tantamount to smoking your cigarette outside your vehicle vs. inside with windows up in the late 60's. It was "safe" then, because mainstream opinion did not consider it "unsafe". Time brings more studies, unbiased studies, which will be fought tooth and nail by those with addictions or money to be made.
I wouldn't buy any ipad for my child, or myself and apologize for not leaving this particular thread previously, when told to do so. I stand by my decision that this is on topic, but realize that it pushes buttons and does branch over in to an entirely new topic at this point.
Good luck with your purchase, I hope you a. research all aspects of the Ipad, and b. are able to find an affordable, possibly used or refurbished ipad if this is something you will absolutely be purchasing for your child.