from the Webkinz Guide
The Magical Charm Forest is a unique are in Webkinz World which combines real-world charm collection with a virtual version similar to the Gem Hunt. Simply buy 1 charm and the Feature Code it comes with will unlock the activity for you, along with 1 row of virtual charms to search for and collect. If you collect all 40 virtual charms you will win an awesome grand prize!
Buying a total of 8 real-world Webkinz Charms will unlock all 8 rows of the activity, allowing you to be able to find all 40 virtual charms!