What happens during the section called "Giggle Box"?

Context: The TV series was starred and created by Justin Fletcher, who plays the characters in all of the comedy sketches and also wrote a few sketches in its first series. Some of the sketches are filmed in the studio, while other sketches are filmed outside; for example, one is filmed at Portmeirion, used for the fictional town of Wiggyville where Captain Adorable's sketches are set from Series 1 to 2. The show is interspersed with a selection of children called the Gigglekids, who tell jokes to Justin himself, in their own section called 'Giggle Box'.

Answer: Children called the Gigglekids tell jokes to Justin.