Perfect for brightening up your school pencil case or pen pot, this colourful Astronaut Erasable Pen features thermo-sensitive ink.The ink magically disappears when rubbed with the plastic sphere at the end of the pen. This sphere will not ruin the surface when rubbed and does not wear down like usual erasers. An easy glide nib and soft touch feel will have you wanting to collect the whole set.. Thermo-sensitive ink. Erase mistakes by rubbing them with the plastic sphere. Sphere will not wear do...