TSA says these common children's toys may not be allowed on planes
You may not want to let your kids carry these items on.

Traveling with small children on a plane can be a major source of concern for parents.
Of course, it’s essential to take kids on vacations to make family memories, or even just to see grandma and grandpa. But having kids on a plane, in tight quarters, with impatient fellow passengers and no ability to run around and play, isn’t anyone’s favorite activity.