We have everything from simple and cheap coloured pencils for scribbling kids to top-quality artists' watercolour pencils. There can't be many tools simultaneously as simple and as flexible as a set of coloured pencils.
See the Faber-Castell Classic pencils for great value sets for kids, but far higher quality than most cheap sets. Speaking of kids, they'll love the Koh-I-Noor Magic Lead Pencil, which writes in a whole array of marbled colours at once - so will many adults!
The Stabilo Woody crosses boundaries too, being crayon, pencil, and watercolour, all in one. It’s perfect for young children, but is also used by professional artists, and even has uses in industry for marking up leather.
For something really unusual, Pilot have turned their popular Frixion pens into a set of coloured pencils, which, like the pens, can be easily and cleanly erased, without leaving a mess behind.