Published in Partnership with The Royal Mint.
 
When Ollie and Grace put their lost teeth under their pillows with a trap to catch the Tooth
Fairy, they wake to find a Watch-Mouse named Wensleydale walking around their bedroom!
They learn how Watch-Mice help Tooth Fairies and travel through magical underground tunnels
to The Royal Mint, where The Chief Tooth Fairy herself is waiting with a special gift.