You can pretty much Steampunk anything. Here's how to make a Steampunk Mr. Potato Head.
You will need:
a cutting mat
Dremel Tool Kit
Premo Sculpey - Baking Clay
Thick card stock paper
Discarded materials around the house. Plastics, wire, metal piping, ect.
Black, yellow, silver, and copper acrylic paint
Step 1: Make a rough sketch
I bought this Mr. Potato Head at Target for less than 10 bucks!
Sketching helped me get started. But ultimately, I let the the materials that were available to me guide me. I first envisioned my Mr. Potato Head to look more like the sketch in the upper right hand corner.