This is a very relevant topic today because of the United flight that encountered unexpected turbulence inflight. News sources are reporting that a non restrained "lap child" flew out of its parents arms and landed two rows today on that United flight. Fortunately, this child was not injured! Can you imagine the horror of having your child ripped from your arms and watching him/her literally flying through the air? As a former flight attendant, I recommend every child ride in an FAA approved safety seat. Parents need to realize that an airplane is a moving vehicle that travels at speeds on the ground between 150-180 MPH (depending on the model). Most parents would never allow their child to ride in a car going 150 MPH, especially without being restrained in a car seat, but they don't think twice about it when on an aircraft. Safety seats are best even for children over 2 because the lap belts on airplanes are not designed to safely restrain small children. They can even cause abdominal injuries to small children in the event of an emergency. That's why we were trained to place pillows between the seat belt and child in the event of a "planned emergency." Every flight attendant and pilot I know recommend safety seats for children. The only reason the FAA doesn't require them is because the airlines have lobbied successfully to prevent it because they fear loss of business. Most U.S. 5 point harness type car seats are also FAA approved, but double check the safety label to be sure your model is before dragging it to the airport. As far as getting through the airport, many airports have electric carts that can be used by families in your situation. Just remember to tip the driver.