We love the kongs! Adelaide's favorite is the Kong Wubba! its thick rubber inside! We got one for her little man for Valentines day and he loves it too! Its one of the few things she can pick up and play with but not sink her teeth into!
http://www.kongcompany.com/newsletter0407.html http://www.dogtoys.com/kongwubba.html
We got one of ours at petsmart but they are hard to come by because they sell so fast! Hope this helps!!!