I have only done small sculpted cakes before but I want to attempt this one for my daughters birthday. I know I need a support system in the middle and arms. I plan on using mainly Rice Krispies for George. Does anyone have a suggestion on what to use for supports? And any other suggestions I'm open to :) I'm am going to attempt to make my daughter a curious George cake. I plan on using Rice Krispies for most of it but I'm realizing I need to find a support system for the middle and arms? What does everyone suggest on using on a middle support system and for the arms. 

It depends on how big it will be but I would use a center threaded rod. There are lots of great tutorials available.

http://www.zerogravity.com.au/cakes/Instructions_Elmo.jpg

Here's a link it's an Elmo but the method can be used for George. hth

Here's another a Bear but also can be adapted.

http://muchamunch.files.wordpress.com/2013/08/muchamunch-teddy-bear-cake-7-arranging.jpg

i would love to see the finished cake, good luck.

 Here is another Elmo with the body made out of cake and the head arms and legs made out of RKT. When I'm working on a project I look at different tutorials, I like having options.

http://www.thecakeclass.com/2011/11/3d-baby-elmo-cake-tutorial.html

Thanks so much, I will look into them all and will post the finish product :)