I took the kids to Wizard World Comic-con Sacramento recently since we were covering it for INFOtainment News.
They had the greatest time!
Admittedly I even enjoyed it a bit (especially seeing how much Isaiah and Jordan enjoyed the conference).
One highlight was a company called twindom, based in Sacramento, that creates a 3D image and can turn that into a 3D printed image. For the technology behind it, their prices are relatively reasonable. This image is an example.