These are the mech characters / objects that i came up with the silhouettes i made from just searching for gears, cogs and pistons :3

The giraffe wasnt going to work that well and i felt the dog was too fiddly, so in the end i stuck with the gorilla, tree and bird, although, we have another task involving interacting with a / one of our already created characters on a green screen, so i may use the dog ^_^