I am going to make this Spongebob toy into a cake for my daughter's 5th birthday. I think I am going to start with a 10" 2 layer cake for the jellyfish and carve it to look the fish.
I think that I'll stack rectangle pieces to make Spongebob himself but I'm not sure the best ways to make the rest of it.
I do have pictures that show other views of the toy if you need them.
Should I make his hands and feet out of RKT and cover in fondant?
His hands and feet are so much smaller than the rest of him that you could probably just use gumpaste.
If you're going to make him out of stacked rectangles, I think a wooden base and then attaching a couple of center dowels to it with screws would be the way to go. You'd still need to use boards and dowels inside Spongebob but at least he wouldn't tip over while you were working on him.
Are pretzel rods the right size for the cake you're making?