Except if you bother to look up the definition of a wagon it’s pulled not pushed:
https://www.dictionary.com/browse/wagon
any of various kinds of four-wheeledvehicles designed to be pulled or having its own motor and ranging from a child'stoy to a commercial vehicle for the transport of heavy loads, delivery, etc.
https://www.merriam-webster.com/dictionary/wagon
a low four-wheeled vehicle with an open rectangular body and a retroflex tongue made for the play or use of a child
For those that need the merriam-Webster definition explained, retroflex means turned or bent abruptly backward and tongue means the pole (see
POLE entry 1 sense 1b) of a vehicle (such as a wagon)
So the users of the keenz were never going against the park rules at the time since clearly they didn’t fit the common definition of a wagon and the rules at the time stated “or pulled by a human, including a wagon”. And even though the manufacturer uses both stroller and wagon in the name of the product it does not make it either of those things. (Which I find it funny people can figure out it doesn’t meet the common definition of stroller but can’t figure out that it doesn’t meet the definition of a wagon, hence why it is a hybrid of the two).