At a certain age, coloring inside implies the growing and development of fine motor skills. At that short age, motor skills development is more important than 'creativity', which is of course a slippery concept.
This is the Paella pobre, made with rice, hondashi and canned sardines, from my student days.
No hondashi? Use Knorr cubes, and there it goes my reputation as a fine home cook.
And yes, i know it's not a paella.