I think very much that TPT needs gum.
Element:GUM
Gum would bounce when stickman or some liquids or powders touch it.It would melt to caoutchouc(CAOC) ? at a relatively low temperature (100-200 Celsius).It would bounce more if there are more pressure created by objects,but also break at some point.Also,it would be possibility to se ctype of the gum to make it less or more stronger,and if life of gum is set to 0,it would not bounce anymore.
Please say what you think about this idea!
breaking at high pressure and bouncing around, seems pretty moving solid