We handed out some of each of these symbols to the kids and the expectation was that when I read about the item they had they would hand me the symbol. When they handed me the symbol, the kid got to pull the caterpillar through the book. I have a big board book copy and a hungry caterpillar that would fit through the holes.
For each child, I made hungry caterpillars from muffin cups that they could use to learn to spell their name, or to practice spelling their name in a fun way. I used alphabet stickers, mini muffin cups, scraps of paper, bristol board and velcro. Dollarama sells patterned muffin cups, and I was able to find these green gingham ones. I could not find red muffin cups, so I improvised and used the gold ones, I already had a home, to make his head. I used scraps of paper to add the details. Then I laminated all the pieces and velcroed them all together.