The coloring book is a magic trick that Greg does in Wiggle Time.
Magic Trick[]
Greg has a picture book, but as he flips through the pages, there aren't any pictures. Let's take another look just to make sure. He flips through them again, but no pictures. He asks if you could help him do some magic to put some pictures in there? Great. Everyone gets out their magic pencils in their pockets, and draw some pictures in the air for him. Then throw the pictures in the coloring book. He flips through the book and now there are a bunch of drawings. Did you do that? Raise your hand if you did. You're all so clever.
Now let's put some color in those pictures. Rub some color from your clothes (Greg rubs shirt) and then throw them at the book. Take a look now. Greg flips through the book but there's no color. Greg ponders and then realizes he forgot to use his magic wand, which he pulls out. How silly. He has everyone rub colors off their clothes. Greg waves the magic wand and has the audience to rub some color from their clothes and throw the color at the coloring book. Greg says, "Abracadabra." He then flips through the book and there is color on the drawings. Raise your hand if you did that. Now give yourselves a really big clap. Well done!