Simply draw & colour or clip these pens together to construct interesting models .
contains 40% more ink and lasts longer .
child safe - food-grade ink .
ventilated caps that are child safe .
colours are washable from most surfaces .
easy to store & hard to misplace .
keeps sketch pens from rolling off the desk .
medium point tip for good ink-flow .
click seal cap prevents drying .
broad barrel-big & easy to hold .