Also take note that bassinets are not guaranteed and the crew may decide that your child is not suitable for the bassinet and not provide one. So for various reasons you may end up with your child on your lap the entire flight as others have pointed out. Although not on EK we had a bad experience on QR last year where we confirmed the bassinet with the airline through our travel agent it even had "bsct" printed on the boarding pass, however our seat was given away to another family with a child upon check in.