What are some creative ways to say happy birthday online?

Are there any funny ways to say Happy Birthday to someone who is really into science?

• Like some sort of science based pun or joke that incorporates a birthday wish in it?

• Answer:

  Wish them a happy birthday in Binary years For example 40 is 101000 in binary On the outside of the card you can say: "There are 10 kinds of People in the world. Those that understand binary and those that don't" The Joke here is that "10" is the binary representation of the number "2" Then the inside of the card asks "How does it feel to be 101000 years old? To figure out the proper binary representation of the person's age you can use this little tool: http://www.mathsisfun.com/binary-decimal-hexadecimal-converter.html Enter the person age in years in the Decimal field and the binary representation of that number will be shown in the binary field