Indradhanush (1989)

The story of a group of kids, who assemble a computer. The computer becomes the host to an alien prince from a planet in the Andromeda Galaxy on the run from his enemies. The following events take a lot of weird turns, one of the kids (the lead character) gets kidnapped by one of the prince's enemies. The Prince gives them a Time-Travel machine. With this machine they try to see their past and rescue their friend.