Many teachers love how you can layer pictures or words behind an object and "magically" pull something out for instructional use. Instructional uses of layering include: hiding vocabulary, sorting words or pictures into categories, revealing answers to problems, etc. But, younger students may have difficulty hovering the select tool and looking for the arrow crosshairs in order to find and pull out a hidden object.
You can group a visual cue with the hidden object so students know where to use the select tool and drag the hidden object.
The visual cue in the example below is the rabbit. The student's name is the hidden word to be pulled out from behind the hat.
The rabbit is on the top layer (right-click and choose reorder to top layer). The student's name is on the bottom layer (right-click and choose reorder to bottom layer). The hat is locked on the top layer, but it is beneath all of the rabbit pictures which are also on the top layer.
After reordering all of the objects to the appropriate layers, group together one visual cue to each hidden word. For example, use the select tool to "lasso" the rabbit and the student's name. Click on the two green squares icon to group the objects together. Repeat for all.
Attached below is a flipchart with visual cues for pulling student names.