I wasn't sure where to put this but seeing how we read garden books for interest and learning I thought maybe a crossword puzzle based on gardening does meet this criteria, albeit at a lower level. It's also a bit of relaxing fun after a hard day at work or in the garden or when your head and finger-ends hurt from sorting out software code.
(No names mentioned.)
There is a help button if you get stuck ....just mind you don't trip over the odd anagram I slipped in....(odd being the operative word!)
www.kengar.com