I really need to find this movieeeeeee

Ok all I remember are that their are 3 kids. A older girl but she is like only 13, a boy who might be 10 or so, and his younger brother. It is something to do with bad guys. This scene I remember is. They either go on a rich boat or a big house and the girl gets into a pool table fight with an adult man that catches them sneeking onto the boat. Also Before this happens they were making a plan in a bedroom and the younger brother found a Hoberman mini sphere in this bed room and was stretching it so big that his head got stuck. That is all I remember so please help!  Like a library movie not that popular