Complex sentence: Staying with his family at an out of the way mountain hotel, young Keith has no one to play with until he meets Ralph... a tiny, talkative mouse with a fondness for Keith's shiny toy motorcycle !
Split into simpler sentences: Staying with his family at an out of the way mountain hotel, young Keith has no one to play with. Until he meets Ralph, a tiny, talkative mouse with a fondness for Keith's shiny toy motorcycle!