Liam had a playdate at a friend's house on Friday afternoon. When I got there the friend's mother was telling me some of the nice/funny things that had happened - like Liam singing the whole of 'Mean to Me' (by Crowded House) with full rock 'n' roll effects and no selfconciousness. (He's learned it by listening to and watching live versions, like the Farewell to the World concert, so he puts in all the extra bits.)
Another thing was when she asked him about permaculture - what it was. His answer? He didn't really know exactly, but he coud tell her it was permanent. And it used potting mix. And was natural.