Thanks to Serina, one of our primary teachers we have discovered that the activity builder can be more complex than we thought! We used to add one activity object to the page and the items were either rejected or accepted. Now we find that we can add multiple activity objects. We select each one and determine which items are accepted or rejected for that object. We do the same for every other object that we have created. It is important that every item on the page is accepted or rejected for each of the activity objects.
One thing we noticed is that if we use shapes as the activity objects, they have to be either filled with color or have a word embedded with them. Otherwise, the activity just doesn’t work.