Bought from new and used for 2 days around Center Parks before being stored in the shed for a year. Works a treat and my daughter loved it. The passenger can pedal and the power goes to the wheel so it’s not just a case of dragging them around and teaches them the concept of pedalling. She loved going fast behind me. In nearly new condition but with a very slight amount of surface rust around the Bottom Bracket welding (that doesn’t affect it at all - see photos). Attaches to the seat tube of any full size bike and folds in half for transporting and storage.

From EBay:

The Weeride Kazam Link Tag-a-long Kids Bicycle Trailer is the perfect accessory for parents who want to enjoy a bike ride with their children. With its sturdy construction and secure attachment system, this trailer makes it easy and safe to take your little ones along. The Weeride Kazam Link Tag-a-long is designed to be comfortable for children, with plenty of space to sit and relax. So why wait? Get out and enjoy the great outdoors with your family today!