Gate of Time (2002)

Original title: Puerta del tiempo

Álvaro and Paloma, are fascinated by the ingenuity of an elderly inventor who has built a machine on whose screen he can see past eras. But the restless Álvaro, messing around, enters the large plasma screen. His sister follows him and the old inventor has no choice but to go after them. They will begin a fabulous journey that will take them from Prehistory to the Middle Ages, meeting the most incredible characters and the most surprises in their busy adventure.