Chariot Cougar 2 kids trailer. (Chariot now owned by Thule)
Brilliant way to keep cycling when you have kids and get them into it. Stuff them in the trailer nice and warm, stick the raincover on and get a good exercise. Then when they get bigger 3+ stick their bikes on the trailer and head up Llandegla Hillclimb. Then put them on their bikes and cycle back down with them.
Much more comfy that a trailer or bike seat, and much warmer.
Converts to a pram.
Converts to a stroller (stupid American pram) with purchase of additional wheel.
Excellent adjustable suspension.