Tim is a little boy. His dad is a scientist. He is always fond of dinosaurs, so  he asked his dad to make a time machine. Finally after many arguments his dad made the time machine. They went to the Jurassic era and the first thing they saw was a stegosaurus. 

Stegosauruses were massive herbivores. They had many plates on their back and spikes on their tail. Although they were big, their brain was really small. 

Tim was giving the stegosaurus some food. The stegosaurus was happily eating the food until she heard there was danger to her eggs.

There were 6 Troodons attacking her eggs. She had 3 eggs. Tim and his dad were also helping by throwing spears at the Troodons.

The stegosaurus was very happy so she gave Tim and his dad a ride on her back.

Troodons were small, speedy dinosaurs. They lived in packs like hyenas. They had the biggest brain of any dinosaurs which made them the smartest dinosaur. Troodons were nocturnal. They were omnivorous dinosaurs.