I hope you can give us a peek at what your students did! My students did this years ago when all emoticons were text only. I was amazed at their creativity.
atw
Text editors
Adding Emoticons
ការពិភាក្សាត្រូវបានបិទ ដូច្នេះអ្នកមិនអាចឆ្លើយតបទៀតទេ។