These are Creatures 1 COBs that were made by the BoBCoB Development team using BoBCoB:

The Wishing Well

This replaces the well next to the teleporter with a wishing well. At long last, a COB that caters to your creatures' every need!

The Frog

This places a frog near the pier of the underground raft. Listening to the frog will entertain your norns and calm them down.