Having troubles finding Regular Solids with blender 2.78 I am new to Blender and I have been watching a video tutorial on how to create a soccer ball. So this guy went to Addons then Add Mesh and he enabled Regular Solids. I am using blender v2.78 and I don't have this option. I am trying to create a Truncated Icosahedron shape.
1- Go to File -> User Preferences -> Add-ons and under Categories click on Add Mesh and enable Extra Objects.



2- Click on Add -> Mesh -> Math Function -> Regular Solid.



3- Press "T" to bring up the tools (if it is not opened already) and under (Regular) solids scroll down till you see Presets and select "Truncated Icosahedron".



Good luck!