A hole in the roof means rain water is leaking in through the ceiling of Tops...
Topsy and Tim
Season 1 Episode 11: Big Box
Jamie the postman is delivering a big box to Topsy and Tim's neighbour Mr Fishwick. Mr Fishwick is out so the twins look after the box until he returns. When he comes to pick it up, they can't wait to find out what's inside the big box.