Thomas has a Secret

Thomas has a Secret is a My First Thomas-style activity sticker book, part of the 2002 Thomas Learning Series.

Plot
Thomas refuses to leave the station, and he does not say why as it is a secret. Annie and Clarabel, his driver and fireman, and Sir Topham Hatt keep asking him why will he not go. Eventually Thomas says that there is a bird on his funnel and it asked him to keep it a secret.

Characters

 * Thomas
 * Annie and Clarabel
 * Sir Topham Hatt