In case you can't read it for whatever reason, it says:
Bonus picture of my birthday cake from that same year:April 15, 1995
Dear Friend,
In response to your recent letter to Steven Spielberg, please accept his heartfelt thanks for your enthusiasm and kind thoughts about "Jurassic Park."
He is always delighted to hear from fans who admire and respect his films. On behalf of Steven Spielberg, thank you for writing.
Sincerely,
Amblin Entertainment
AE/mm
Check out my other thread of awesome pictures from the same year at the JP exhibit at Universal Studios.