Staedtler Triplus Fineliner 334 in Magic Box - such a great gift for any age group
The fineliner has an ergonomically designed triangular barrel for a comfy grip and comes in 12 classic colours.
It has a water based ink that will wash out of most materials...
and the cap can be left off for at least 24 hours without the pen drying out
It writes with a 0.3mm line and has a metal-clad tip