Go to your igloo and upgrade today and get ready for the new Rockhopper Adventures. If you go to page 3 & 4 of the catalog you can find 2 hidden items there:
Click on the Maple Hardwood to get the hidden: Dance Floor
Click on the word Igloo to get the hidden: Secret Stone Igloo
The 2 new Igloos are on page 5 & 6:
There are other hidden items, but nothing new from before.