Show the preschoolers some visuals of dinosaurs, ideally on a smart board so that they can gain some understanding of their size. Show them an extract from a movie such as "Jurassic Park" so they can see the dinosaurs move around. Tell the children the dinosaurs' names and discuss their appearance as a class.
Have the children color some pictures of the different dinosaurs. Ask them to discuss in groups what they think the dinosaurs ate and how they moved.
Read the preschoolers a story about dinosaurs and have them sing some songs, such as "I'm a Mean Old Dinosaur." Have the children play interactive games about dinosaurs on the classroom computers or ask them to listen to stories about dinosaurs online.
Create a timeline with the children so they can see when the dinosaurs roamed the Earth and when humans came into existence, according to scientific evidence.
Have the children work in groups to create short, dramatic skits about what would happen if dinosaurs reappeared on Earth.
Get the children to make simple, model dinosaurs or create dinosaurs from pasta shapes.