My youngest daughter was 8 the first time she went to Islands - I think they'd been open for less than a year at the time so not quite as many attractions as today. I'd always been a bit afraid of most thrills rides and I wanted her to be braver than me so I insisted that our first ride of the day would be the Jurassic Park ride, telling her that it was similar to Splash Mountain at MK. She was dubious but we did it and that was our first stop in Islands until the Harry Potter section opened. Now at 22, she's still ready to hit that ride first when we go.
But Islands isn't all Harry Potter and thrills rides.
While we continue to do several of the more thrilling rides, my daughter and I always find time to do the Cat in the Hat ride once or twice on every visit - when will we grow up? We have also enjoyed Poseidon's Fury and Jurassic Park Center as a bit of departure from all the action. And Harry Potter's Hogsmeade and Hogwarts Castle are incredible to take in even if you don't go on the fantastic Forbidden Journey ride.
Though this grandfather isn't 70 (yet), I am a lot closer to 70 than I am to the ages of typical parents of pre-teens and I find lots to do and see at Islands. If the PP's mother is moderately adventurous she'll have a great time there.
Dick Taylor