Everything else is already here, so why buy new? Why buy more? Case in point: watercolors. Look at those old cruddy paints the poor kid has to work with, while the big kid gets the fancy stuff.
I was about ready to give in and just buy the kid a 99-cent set palette, but then I saw his face.
And I realized, he doesn't care. A paint brush, water to dip it in (and consider dumping), and paper to show me whah I made! He's happy.
I will continue to clean up the crusty dried up colorful crumbs until he gets old enough to care. Or until the six-color palette goes on sale. Whichever comes first.