My eleven year old grandson is very effusive and still very smiley, he's a bit of a Harry Potter lookalike at the moment, wears the round specs, and he does know how to get round me. I hope he doesn't literally morph overnight into "Kevin". His sister 15, swings between very talkative and mono syllabic but to be expected, hormones! Casting my mind back I think I was just like that too. She comes alive when demonstrating dance moves, her passion, which she's good at, far more co-ordination than I ever had.
I remember the grandchildren from my o/h's first marriage being born, in fact they arrived just a few years after our own children, now all delightful twenties and early thirties. In fact the eldest, just a mere 3 years younger than our youngest son, has just given my husband his first great grandchild. They live in New York but are coming back later in the year, so he's looking forward to meeting the new baby. I do however remember some of their monumental screaming matches they had with each other as teenagers, and the occasional gladiatorial battle, and they're girls
Which surprised me because we have boys and they' never really had any fisty cuff fights. Although they've made up for it in other ways, one in particular was a very difficult teenager and the other just became pretty mono syllabic. Now when he phones, I can hardly get a word in and we can talk for hours and like me he is an avid reader but reads quite a lot of non fiction so is always asking me for recommendations fiction wise. He walked off with some books when he was here a week or so ago to take me out for Mother's Day I sent him back with "The Women" for his girlfriend which she loved and some of my William Boyd's, he messaged me the other day to say "all the books I've ever pointed him towards have been fantastic" That made me happy.
The teenage years are rarely a joy to experience either for the teenagers themselves or their parents. You just have to get through it and tell yourself nothing is forever!