The kids from Mrs Moo’s class are running wild – it’s bedtime, but none of them can sleep – one’s had too much sugar, another is afraid of the dark, one can’t put his game down, one read a far-too-scary bedtime story and another – a crocodile – actually just has too many teeth to clean! In each house on Sparrow Street, the grown-ups are repeating ‘now go to sleep’, but nothing is working.