On the farm, everybody pitches in to get the job done! With the Set of 4 Erasable Gel Pens Farm Sweet Farm - Erasable Pen from Legami, you can bring a whole farmyard of animals to school with you inside your pencil case, where they'll be ready to help any time you make a mistake: just rub the sphere on the tip over the thermosensitive coloured ink to erase it and start over! 0.7 mm tip Cow: black ink, Pig: pink ink, Donkey: green ink, Rooster: red ink