I drew a Sperm Whale in class one day because I was bored.
Sperm Whales are easy to draw:
Step 1 - draw a rectangle
Step 2 - give it a whale tail
Step 3 - give it flippers and a fin
Step 4 - give it eyes, a mouth, and a blowhole in the right place
Step 5 - ???
Step 6 - Profit