Oh I have an idea for you both, well my DS kind of gave me the idea.

He is a little sticky beak and I don't drive so we have caught the bus once or twice. ONe time I took him in the Hug a Bub. while waiting for the bus it was like he was watching the tennis his little head going back and forward watching all the cars go by and looking at all the new things he hadn't seen before.

Once on the bus he gets to stare at all the people and still be close to me. Plus most buses do a round trip so you could just get on and enjoy the ride. The vibrations of the bus when DS is in his pram also put him to sleep.

You could do all this with a train or a tram too, but I would aim for non peak hour