I like this brand Stabilo and I find out that you can trade in your old colour pencils from Stabilo Malaysia. Yeah it is worth it so check out the link above for more detail. My son tried several brands of colour pencils and I find this brand suits him best.
I have purchased a few pack of colour pencils for home use and school use. You never know if it is enough for him, sometimes he comes home with missing colour pencils. I like the jumbo Stabilo colour pencils, my son's classmate saw him using it and they want to purchase the same one too. :D