Bah! Your brother is cute and cuddly and adorable and I might steal him someday. Ask Cass about the woe. He understands.
And it's ok I'm a little sister, many many times over. I'd say ask my brother about my skills at annoyance, but he's got this thing about arms and unattaching... it's not pretty.
I generally go with the basket form of transport, but I suppose a cart might be doable... I think it sounds like a fair trade.