Happy 6 months Lucas!

Lucas posing for a picture / The Toledo Zoo

The Toledo Zoo is calling him a quater ton of fun.

And to help celebrate Lucas the elephant's six month birthday, the zoo is offering you a chance to wish him a happy birthday with an online baby book.

Lucas was born on June 3. Since that time he's gained more than 300 pounds, has fourth teeth and is loving his new home inside the elephant exhibit.