Arthur, tired of being the only one in his class who still has all his baby teeth, waits impatiently for his loose tooth to fall out.

Arthur's new puppy causes problems when it tears the living room apart, wets on everything, and refuses to wear a leash. Arthur the aardvark teaches his new puppy a few basic manners.

Arthur finds everything about Halloween scary, including his little sister's costume, his morning snack, and the big house on the corner. Arthur must find courage to help his sister on Halloween. Bowker Authored Title code. Arthur must find courage to help his sister on Halloween.

His friends tease Arthur when he gets glasses, but he soon learns to wear them with pride.

Their friends must decide which party to attend when Francine schedules her birthday party for the same day as Arthur's birthday party.

After bragging to his pen pal about his basketball skills, Arthur realizes that he has to make good on his boasts when the pen pal comes to visit.

Buster tries to convince Arthur, the Brain, and his other friends that he not only saw a UFO but also a comet heading for the earth.

Rumors about sightings of an alien space ship create excitement when Arthur's friends come to spend the night.