New fluorescent crayons are now available in sets of 10 colors from Kokuyo. 
This neon color crayon stays bright and vivid when layering over your ink drawing. 
It's soft and smooth, and you can enjoy mixing colors by layering them on top of each other as well! 

The set includes: Red, Yellow, Yellow Green, Green, Blue, Orange, Aqua Blue, Purple, Pale Orange, Brown

Package Dimension: (W)8.5" x (H)3.5" (D)1"
Made in Japan

Also available: Translucent Crayon Set