Here are a couple of screencasts that I had made last year on how to create two different types of "containers" using Promethean's ActivInspire software. I've also embedded the directions so that you can print them out.
The first screencast demonstrates how to create a basic container that will only contain one object and then reject other objects that do not belong. (Bonus! When I published this screencast on YouTube, I must have forgotten to delete the extra tutorial at the end. So you'll get some bonus material at the end of the "Container Tutorial". Enjoy)
The second screencast demonstrates how to create a set of containers that will each contain multiple objects and reject other objects that do not belong.
But... If you want to save yourself some time on creating containers, I highly recommend downloading the two resource packs - Containers Made Easy 1 & 2 from Promethean Planet. Click here for the link to those resource packs. If you have any questions, feel free to email me.