A new Kangaroos warning sign set found under Metadata / Game Objects / Environment in CAW. You need Ambitions and to place the packages in both the mods/packages (Sims3 ) directory and in the "The Sims 3 Create a World Tool/ Packages" directory for the signs to show in your game. There is an earlier post explaining how to install items in CAW.
Importing packages into CAW
Kangaroos warning sign set