In reply to PaulW71:
Symonds Yat - It's not called the Introductory Rocks section for nothing, but it is rather polished in places as a result. Often crowded with groups, too.
There are plenty of low grade routes scattered along the other sections, all with relatively easy access to the top and trees to anchor from, but you might need a long sling for some of them. Some can get quite vegetated from lack of traffic.
If he gets bored climbing, it is possible (although not necessarily recommended) to get into the caves from near the Longstone.