Take care , Peter . Don't run so fast . Are you tired ?   Oh , yes . May I sit on the grass ?   No , you mustn't sit on the grass . Don't you see the notes ?   Yes , I can see it . But what's on it ?   It says ' Keep off the grass ! '   Well , there's a bench under the tree . We can sit there .   Be careful . You can't smoke here .   Why not ?   Can't you see the notes there ? It says ' No smoking here ' . 