This Google Slides has 179 morning messages! Most of the slides will work for any grade level. It also very easy for you to adjust little things on a slide if it doesn't work for your class (please read the bottom of this for tips). All of the messages are short and sweet in order to encourage your students to share or turn and talk about the message.
Some of the topics included on the morning messages are:
-lesser known national holidays ("World Kindness Day, etc.)
-jokes (drag the "Top Secret" folder on the slide to find the answer)
-a different greeting for each day including greetings in different languages
-all subjects: math, science, social studies, writing, and reading
-pictures on every slide
-and much more!
I put "Love, Your Teacher" at the bottom of each message. If you want to change that to your name, hit control + F. Then click the 3 dots. Type "Love, Your Teacher" in the first box. In the second box type what you want to replace it with such as "Love, Mrs. Jones." Click "Replace All."
I don't have a date on the top of the slides because I like to reuse these every year and it's too much work to update the dates each year but there is enough room for you to add in a date line above the greeting if you want proper letter form.