Kell, the Alien: Book 1, The Aliens, Inc. Series

Shipwrecked on earth and desperate to make money, an alien family decides to make a living by opening Aliens, Inc., an intergalactic event-planning business master-minded by 9 year old alien boy, Kell Smith.
Kell discovers that his neighbor, Bree Hendricks, turns 9-years-old next month and she wants a party with an alien theme. That should be simple as flying from star to star. But things aren’t that easy: Earthling’s ideas about aliens are totally wrong. Even worse,
Principal Lynx is a UFO-Chaser and suspects aliens around every corner.
Will the Aliens totally blow the Aliens Party? Will Principal Lynx capture Kell and his family and them over to the government?