The gang investigates strange voices in Busytown Museum.

Huckle wants to find out why a smoke alarm keeps going off but there is no fire.

The kids' sand castle gets trampled overnight.

A set of ski tracks runs on either side of a tree.

The gang searches for the owner of a mysterious sketchbook.

A strange temperature drop turns Busytown's summer into winter.

The gang is determined to find out why coupons for free cookies fail to arrive in the mail.

A model boat is mysteriously broken.

Huckle and his pals help Baby Sadie find her lost doll.

The gang wants to find out why cars are disappearing from a parking space.

Huckle, Lowly and Sally set out to discover why their mini putt balls are disappearing.

Gold coins Mr. Fix It found on the beach disappear.

The gang tries to find out why Sally's yellow T-shirt has mysteriously turned green.

The children discover pieces of a large metal hand.

Photographs on a lost camera help Huckle and his pals find the camera's rightful owner.

A jellybean list made by Sally disappears.

Huckle and the gang search for a priceless treasure hidden somewhere.

Huckle and the gang search for a priceless treasure hidden somewhere.

Lowly is convinced there is a monster loose in Busytown Lake.

Huckle and his pals try to track down a bad driver.

A giant circle appears in the middle of a cornfield.

Potatoes drop from the sky in Busytown.

The gang sets out to find out who is painting red spots throughout Busytown-

Huckle and Sally and Lowly try to figure out who would own a tiny piano.

Huckle and his pals help Mayor Fox find the ceremonial key to Busytown.

The gang searches for the person who is knocking on doors.

Huckle and the gang are puzzled by a puddle full of goldfish.

Sgt. Murphy's radio receives a mysterious message.

The gang finds numbered papers blowing around the park.

The milk in the store Father Cat runs is sour.

Huckle and the gang try to figure out why their pizza delivery is unusually late.

Hilda Hippo thinks there are real fairies in Busytown woods.

A lost bag is discovered.

Huckle, Lowly and Sally investigate when flat tires of Busytown cars happen everywhere.

Sally, Huckle and Lowly look for the lock that fits the old key they've found.

Huckle and the gang are puzzled when they find chocolate sauce on Lowly's apple car.

Ginormous sneezes come from Hilda when she gets into Sally.

Lowly and Sally try to figure out why laundry keeps disappearing.

The gang investigates when the newspaper does not show up at the houses.

Huckle, Sally and Lowly find a huge tooth.

Huckle, Lowly and Sally investigate a strange discovery of a big number 10.

Huckle and friends try to determine who is causing a traffic jam.

Mysterious party invitations are sent out.

A gigantic spoon is discovered.

Strange incidents and sounds make Pig Will and Pig Won't think a hungry bat is on the loose.

Mayor Fox mysteriously disappears.

A spaceman suddenly appears in the Busytown apple orchard.

Someone has taken all the red roses from Granny Goat's garden.

Busytown citizens fall asleep during the day.

Someone switches Huckle's car with another.

A nameplate about to be put on a statue of Admiral Hornblast goes missing.

Pig Won't's secret spy ring disappears.