Costume dilemma

Okay, I am having a Halloween dilemma. All the costumes for kids Carter's age are SO bulky! I had decided that Carter was going to be a cute lion. I went today to the Nature Preserve to take some pictures for a Halloween card and I realized there was no way Carter would walk around in this costume. As cute as it is, it is not practical! Anyone out there have any suggestions? I have included some precious shots I got today in the lion costume.

"I'm not "lion" this is NOT a comfy costume!