12-Piece Jumbo Connector Pen Colouring Set These Faber-Castell Connector Pens are great for drawing on card, paper, posters and more. The pens feature a unique cap design which allows you to click the pens together so you can have fun building things when you're not drawing. The ink is non-toxic and is water-based, so it can easily be washed from skin and clothing. These pens have strong tips with a unique, childsafe cap design to prevent the ink from drying out The large ink reservoir means the pens will last longer The ink is water-based so it is easily washed from clothing