In the book, George speeds up the production line and ends up working on it. Have the group put together jars of chocolate-covered candies or another multi-step task. Ask each child to stand along one side of a table. Assign each member of the group one specific step, such as counting the candies, placing the candies in the jar, wiping off the jar or placing the top on the jar. Have the children see how fast they can go and if things get backed up, touch on the importance of teamwork. If you have more children than jobs, have members switch roles once the first team has gone through the exercise.
Make several different types of chocolates out of construction paper. You can do plain, round chocolates, round chocolates with red centers, square chocolates or any other type you want to make. For each group member, make three of each type of chocolate. Place the chocolates on a large table and have the children sort them into the different varieties. Once that has been completed, have each member count out three for their own box of chocolates. This will teach the children about counting and matching.
Depending on the ages of your group and the facilities available, you can create your own chocolates. The easiest way to do this with a large group is to discuss the history of chocolate and then go over different ways to make chocolate. Buy a chocolate-making kit and have the children watch as an adult goes through the steps. Ask different children to act as helpers, but adults should do most of the work. Let the chocolate form and allow each child to take some home at the end of the session.
The candy that Curious George made at the factory was placed into chocolate boxes. Have the children design their own chocolate box front on paper, drawing items they think will entice people to buy the candy. If the children are older, use this as an exercise to talk about marketing. Younger children will enjoy coming up with their own candy names and design. You can even attach the drawings to the tops of real candy boxes and have the children give them as gifts to their parents.