I bought this for S$3.5 and quite like it. The colors are bright, and the best thing is you can make both thin and thick lines with it, by holding the pen at different angle.. The only problem is, like most other marker pens, the color will bleed through the paper easily, so you need a thicker paper to draw on.

12 Jumbo Magic Pens Marker

Tiong Bahru drawing using Jumbo Magic Pens Marker