Move the mouse around the screen and allow the sprite to touch the mouse-pointer for it to say "That's the mouse!"
I made the project so that the user can interact with the project. Instead of just watching the sprite moving around and saying blue when on a blue block I made it so that the user has to move the mouse around on the screen and whenever the sprite would touch the mouse-pointer the sprite will say "That"s the mouse!" or else "Nope!"