Well, there not THAT old, but they're not new. Just found one of those disposible cameras and look what was on it!
This is the "skull" for TARPO, carved out of a glued-together assembly of styrofoam packing things I got from the computer department where I work.
I used a pair of superballs purchased at The Dollar Store for the eyeballs.
Here is my son wearing the finished costume. I covered the skull with green plastic tarp material, attaching it with a bunch of glue, duct tape and staples. The body was made by cutting out a body outline from two sheets of tarp, stapling and duct-taping the edges and turning it inside out, plus adding a bunch of tarp strips to look like seaweed. I cut up some plastic jump ropes I bought at The Dollar Store to make the "tongues" that come out of TARPO's head.
Here is my son modelling one of the hands I bought for the TREESPIRIT monster
Here is the UNDERBUG before we painted it.
Here is my son with the finished UNDERBUG.