"Happy Birthday! I hope you have a great day filled with fun and laughter."
"Wishing you a very happy birthday! May all your dreams come true."
"Happy Birthday, dear friend! I hope your special day is filled with lots of presents and cake!"
"On your special day, I want to say how much I like you. Happy Birthday!"
"Happy Birthday! I hope you have a fun day and get all the toys you want."
"Wishing you a very happy birthday. May your year be filled with happiness and joy."
"Dear [friend's name], I hope your birthday is as special as you are. Happy Birthday!"
"Happy Birthday! I hope your day is filled with lots of fun and games."