Simple birthday wishes for your classmates

Sure! Here are some simple birthday wishes you can share with your classmates:

"Happy Birthday! Hope your day is as awesome as you are!"
"Wishing you a fantastic birthday filled with fun and laughter!"
"Happy Birthday! Enjoy your special day to the fullest!"
"Hope your birthday is as amazing as you! Have a great one!"
"Happy Birthday! Here's to another year of great memories together!"
"Wishing you all the best on your birthday and always!"
"Happy Birthday! May your day be filled with happiness and cake!"
"Cheers to you on your special day! Have a wonderful birthday!"
"Happy Birthday! Enjoy your day, and don’t forget to make a wish!"
"Wishing you a year full of success and happiness. Happy Birthday!"

Feel free to modify any of these to make them more personal!