I tried to bring one big to Japan by using a "Red, White, Blue" bag, haha, I put a little chair inside as well for their shower in the tour. Haha! when i sent it out in the airport, 領隊 laughed to me and ask how to send it out, but hey......I have a diamond membership card, who could laugh to me? They helped me to put "First Class" tag on the cheap bag tim la!!! haha!
But frankly speaking, really not conveniences, folded one is ok lor!
better bring la! kid using thing better for personal lor! buy la! but you can search in some toy's street in Wan Chai or Mongkok, maybe cheaper! go go go lor!