Can anyone recommend a 3D designer app for quick 3D sketches?

[therealriley]

I like to build things, so im looking for a easy to use 3D design app. It only has to be basic just so i can get a quick visual on what im building, with the option to add colour would be great. Any ideas? Ive had a quick look but they all seem to be furniture designers.

 

[Adrou]

I'm so late, but if someone is wondering to find any app like you, there's many apps by autodesk; 123D Sculpt, 123D Creature, 123D Make Intro, Formit...