On TheDollPalace.com, for example, dolls of every shape and size are available for children to play with and create, and then favorites are created into coloring pages. When dolls and coloring pages are complete, there are still interesting articles to read, personalities about the dolls to create, contests to take part in, and even forums and chats to visit to get to know other doll and coloring enthusiasts.
You can metaphorically take a page out of a coloring book, and break up the work into a few sections. Each team member or group within the team should first be instructed on which part of the page they are going to color, let them know what color they can use, and when their turn will come up. Next, after each team member has finished their part of the coloring than take the completed picture and hangs it up so that every one can see their part of the picture and the entire teams contribution.