Does the triangle have to be a triangle, or can it be a cone?
For colors, I think someone did a whole bunch of gems, you can use those to get the colors. (Or you can make your own material if you have Gimp or Photoshop) For the shapes, type in basic-insert shape- Such as: basiccube, basiccone, basicsphere, etc. Jayfeather did some human tools that has a scythe in it. That's all I know as far as other people's meshes go. Hope I helped. ^^