Sing along to the tune of Old Macdonald had a Farm, and learn to put down your phone in this hilarious cautionary tale for a new generation of phone-users.

Old Macdonald loves his phone: it helps him organise his farm.

But when the animals each get one of their own, they are soon on their phones all day - "Here a tweet, there a chat, WhatsApping the farm cat" - and before they know it, no work is getting done!

What can Old Macdonald do?From the award-winning partnership of Jeanne Willis and Tony Ross, the fourth in the series of picture books exploring online issues.