Download our free house coloring page PDF now for free! Perfect for keeping kids entertained when it’s raining, freezing, or an alien invasion begins. Just hit the button and print the picture from home, and the coloring can start. Fun fact: The shown pterodactyl is actually way too big! Pterodactyls had a wingspan of about 3 feet, which means they were actually quite small. The less famous Quetzalcoatlus, however, was a pterosaur as well and could reach a wingspan of 33 feet! That’s huge compared to the pterodactyl. So how come nobody knows Quetzalcoatlus? Probably because of its weird name.