Black Lamb is getting a bit big for the seat on the back of my bike, she's 4 in October. She's not far enough on with the balance bike to be getting her a bike for her birthday but thinking to go out on the bikes we're going to have to get a tag-along or a bike and a tag along attachment. Most routes from our house involve at least a stretch of busy-isa mill-town road but most drivers are courteous and there are a fair number of bridal-ways and footpaths that are locally treated as bridal ways. I think we'd get most use out of a bike and tag-along attachment as most rides do go via a park which would let her practice, especially if we went on one of the old railway lines where she could ride herself a bit. I think my worry is her suddenly deciding she doesn't like it or too fast and trying to get off, I know each child is different but has anyone had this issue? She can use the balance bike, just pootling not really scooting, perhaps a bike for christmas might spur her on in time to go out in the summer? I know my in-laws have got her a bike at their house that happened to come with stabilisers and we're off out to visit them in October so may be able to get a fair bit of cycling in on the sea-front where it's flat. Any recommendations of tag-along devices? It'll be fitted usually to mountain bikes with disk brakes if that makes much difference.