I'm trying to find an old Sci-Fi movie I watched when I was a kid, I remember the storyline quite well. It started off with a boy and his family, the boy's mother tells the boy to get his brother who is hiding in the forest. He gets scared by his brother and somehow falls down and gets K.O. I forget what happens but I remember he goes inside some alien spaceship, and on that spaceship there are lots of alien specimens he talks to the alien being in the space ship.
I forgot what happens after that but he finds himself in the future and he finds out his family does not live in the old house anymore and have moved, he later finds them and his little brother who is actually older than him and bigger than him, everyone is amazed by this including the media and they run tests on him, he is able to escape by hiding in some kind of robotic food serving machine and the help from some woman. I also remember how his little brother sets off fireworks to signal him or something.
I really don't know the year or anything else much about the movie.