In each world in Banjo-Kazooie
there is one exit pad, it is how you enter and exit each leval. To do so all you must do is stand on it, be careful that you do not accidently walk on it if you do not mean to leave the leval, as there is no prompt asking you, it just takes you. In the beta of the game they were not grey, but coloured in. For unknown reasons the colour was taken out and a grey looking stone with Banjo
face on was used instead.