The cow Lieselotte loves to scare the mailman when he comes to the farm. The packages break regularly, to the regret of the farmer's wife. Her attempt to get Lieselotte out of her lullabies is going awfully wrong. But when her first own package breaks, Lieselotte realises what she has done with her behaviour. Finally she finds something that she enjoys even more than frightening the postman. The cheeky cow Lieselotte has already taken many children's hearts by storm. The lovingly illustrated picture book with many details invites the children to a trip to Lieselotte's farm. This is where the Literacy Project comes in and provides children with lots of interesting information on the subject of "Milk and dairy products". How does the milk get in the fridge? And what can you make out of milk? But also the profession of the postman becomes thematisi.