Imagine coming face to face with a massive Tyrannosaurus Rex or a Stegosaurus.
That'd be pretty scary.
Now picture what it'd be like to actually be a dinosaur!
Ok that's not really possible...or is it?
A herd of 18 dinosaur puppets are used in the 'Walking With Dinosaurs - The Arena Spectacular' live show.
They're all life-size and have been designed to look and move like the real thing.
A team of puppeteers bring them to life on stage.
Newsround's been to meet them while they tour the UK, to find out what it takes to be a dinosaur.