Evidence-based ideas to help kids communicate, connect, empathize, and read minds. Â© 2015 Gwen Dewar, Ph.D., all rights reserved. Social skills activities put to the test. We want our children to succeed in the social world--to learn how to cooperate, make friends, and negotiate conflicts.
A light pen is a light-sensitive computer input pointing device shaped like a wand. It is connected to a visual display unit or CRT monitor and allows the user to modify data and text or make menu selections on the screen. Light pens became popular during the 1980s.
Gel pens use the same mechanism of ball and socket,as the ballpoint pens do. The difference is between the ink used,and the way it is stored in the reservoir(refill). The ink of gel pen is highly viscous. It is a suspension of colour pigment in water-based gel. As the ink is thicker and more opaque,it shows up more clearly on the dark surfaces. Their is a plug of clear gel-like 'stopper fluid' at the other end of the ink column in the refill.