Don't limit what they can offer due to the fact that they don't have many supplies to work with. You can even consider offering them craft supplies such as glue and glitter, cotton, ribbon, and other items that can all become a part of the Spongebob coloring pages they are completing.
It is little surprise then that Winnie the Pooh coloring pages have also became a firm favourite among children, and the sales of Winnie the Pooh coloring pages far outstrips the likes of other Disney characters. It should be noted that the term "Winnie the Pooh coloring pages" is something of a misnomer because currently, the Winnie the Pooh franchise is taken to include all of the characters, such as Tigger, Piglet, Christopher Robin et al.
She just loves to color in their dresses and jewellery and the more brilliant and extravagant she can make them the better. She has really improved with her hand eye co-ordination and creativity since she started regularly using these too. I always ask her to autograph her amazing works of art and I can see over time how much better her writing has become. I know I will treasure these momentos when I am older.