This is a known problem which only affects a few iPads so Apple aren't busting a gut to fix it. They do know about it and it will probably get resolved at some point. It also affects iPads of all ages...
If a soft reset hasn't fixed it, you will probably find that disabling JavaScript by going into Settings->Safari does the trick. Obviously, this disables JavaScript and you may not get the full experience with some websites.
Other options are download a diiferent browser from the App Store such as Chrome, Firefox, Puffin, etc. There is also a free browser from AdBlock Plus which has some obvious benefits.
An iPad 2 in the family had the same problem this week and I tried an Erase all Contents and Settings through Settings->General->Reset and then restored it from a 4 month old iCloud backup - (it was definitely working fine 4 months ago...) So far so good, although I have heard of some people running into the same problem again after 2-3 weeks.
The general suspicion is that it is caused by a unique combination of installed apps, or perhaps just one in particular, but none have been identified as a universal problem.