About 3 years ago I took my father up for his first flight in a light aircraft - we went via Biggin Hill, up to the Thames at Gravesend, then all around the Kent and Sussex coasts down to the IOW, showed him the Needles, then back up to Fairoaks.
Lovely flight. He really enjoyed it, and he was so proud of ME, that I could do all the aviate/navigate/communicate stuff and still point out the sights and have a chat!
Brought my brother on a similar trip - just as well I had provided sick-bags!!!
First time I brought my eldest son up (he was 6 or 7), we did a few circuits just to check that he was OK (not the greatest traveller). Then set off for a local flight. Next thing, at about 3,000 feet: "I need a wee..."
And yes, of course I had urged him to go before we left - too much excitement!
SD