Planets order are easy if you make up a story. Mercury, imagine it as a thermometer, really close to the sun, which heats up and like a cartoon, explodes. This glob of mercury flies towards venus, this divine goddess, who catches it, examines it, then tosses it over her shoulder into her back garden; earth. The mercury then hits a rock in this garden which flies and hits Mars, a angry red devilish looking guy, in the face who then gets really angry and starts jumping up and down. Things are about to kick off when this huge giant called jupiter comes striding down the road, wearing a T-shirt with "S.U.N." on it, which stands for saturn Uranus Neptune.
Now everyone who reads this thread will be able to remember the order of planets lol.