BT, DH has driven with both the DSs on his lap when they were smaller, only parking the car, but they loved it! He even let them change the gears I think. Anyway, you'll definitely hear no cries of 'bad mother' from me, far better to have him where you can see him than upset on his own where you can't see him, babies his age don't need long to find mischief! Bless him for saying 'bye bye' at nursery!
I often leave DD in the house alone too Buzzy while I go and hang the washing out, there is no way I could have her in the garden with me while I did it, she is too keen to throw the washing everywhere help for that, plus our garden is only baby friendly if she is supervised! Usually she will go into the conservatory and watch me, waving, laughing and blowing faces on the glass!
Caz, DD doesn't watch any television but that is because she isn't interested! The DSs often have it on but she ignores it, I've even tried watching Cbeebies with her (I love ITNG) to no avail. DS2 was like that too (unlike DS1 who has always been a telly-bug) and I always put it down to his poor eyesight but DDs eyes have been tested and they are fine so perhaps it is just that she is a very 'busy' child (much like DS2 actually) and hasn't the time to sit still. Music, however, is another matter - she loves it and just can't help herself from dancing and 'singing' along if it is on.