My son wanted an Incredible birthday party and I decided to make one Incredible cake for him. I used the Wilton stand up teddy bear as a start and carved out the shape for Jack Jack. I also used two rounds for the other layers, one for the logo and one for the candles and Dash.
It was simply colored butercream frosting and a lot of stars. I did Jack Jack freehand using an action figure as my guide and I used a photo copy of the emblem to get the basic outline and just filled it in with stars.