Reddit mentions of Winsor & Newton : Professional Watercolour : Lightweight Metal Sketchers Box Set : 24 Half Pans (24 Colors Set)

Thanks! I use this Winsor & Newton set. (I use barely half of them!)

I've used Rembrandt (meh) and Derwent pencils - the Derwents are nice on the go, but my favourite so far is this:

https://www.amazon.com/Winsor-Newton-Cotman-Colour-Sketchers/dp/B00004THXI/ref=sr_1_1?ie=UTF8&qid=1491486681&sr=8-1&keywords=winsor+and+newton+watercolor

The Cotman sketchers kit. I have three tubes added to it - Payne's Grey, Ultramarine Violet and Leaf Green. There's three mixing spaces in the top, I just leave a bit of each colour squeezed in the top because it dries between uses, and I find it to be a good 'complete' colour kit.

If you want the 24 pan set, it's here: https://www.amazon.com/Winsor-Newton-Water-Color-Metal/dp/B001M6VMTY/ref=sr_1_2?ie=UTF8&qid=1491486681&sr=8-2&keywords=winsor+and+newton+watercolor

I like the half pans for sketching, but if I'm doing professional illustrations in my studio, I usually use tubes (Holbein or Winsor and Newton are my faves). I do keep going back to the red in the Cotman pans though!

Good luck!

Looks like she's using acrylics? We don't know what she already has, so it's harder to make suggestions. If she's using student grade acrylics, she'd probably be super happy about artist grade.

You could also get her a pretty badass set of professional watercolors and paper for that price if you think she might like that kind of medium.

Or oils, or markers....