Thanks all! crisis averted, we used jjimm’s idea after all and installed Chrome on the PC. HotDogWater Jr beat Angry birds in a couple hours of play (and I noticed that there was no Hi Score in the corner of the screen, which I take to mean he beat it in one continous game) and has lost interest in playing it on the iPhone.
Still gonna figure out the iPhone issue - but for now the pressure is off.
an excellent result to my first OP
Thanks again
HDW