Undertale Fans NEED HELP FAST! (birthday related)

[True]

OK SO here's the problem.

I want to make an undertale themed birthday card for my nephew who's birthday is on Tuesday.
I've never played the game though. So I'm having trouble figuring out what the card should say.

I've seen so much cool undertale themed art that I kinda get an idea of their personalities, but I still need help xD
Anyone have any ideas of something Sans might say to someone on their birthday?

I really only have tomorrow to work on this and then, I will be shipping his Gifts out first thing monday. My Nephew is turning 10, so nothing too inappropriate please. :p

[Bekuno]

Determination is a big theme of the game. When you save a game you often get a little bit of dialogue, something like "knowing that the mouse will one day leave it's hole and take the cheese from the table.. it fills you with determination!" Maybe something like that but birthday themed? "Knowing you'll have cake on your birthday.. it fills you with determination!" 

Sans mainly makes skeleton puns and is generally a laid back character (unless you decide to start killing people). So I think something funny and friendly would be good.

[True]

Determination is a big theme of the game. When you save a game you often get a little bit of dialogue, something like "knowing that the mouse will one day leave it's hole and take the cheese from the table.. it fills you with determination!" Maybe something like that but birthday themed? "Knowing you'll have cake on your birthday.. it fills you with determination!" 

Sans mainly makes skeleton puns and is generally a laid back character (unless you decide to start killing people). So I think something funny and friendly would be good.

That actually sounds really good! xD I might use that hah, dont have any other suggestions anyway. :p

[archidraca]

WARNING : You must use the proper typeface or he'll be upset with you. Don't capitalize the starts of sentences or anything that isn't used for emphasis, even if it's someone's name. He's lazy. I made up this based on his humor:

my friends told me to break a leg when i told them i wanted to make you a humerus birthday card.

Make of this what you will. 

[True]

That's good to know about the writing style! But I'll be hand drawing it so.. I'll do my best xD

its funny because just a week ago.. I was like wait a minute.. Sans.. comic sans.. omg, then quickly checked the papyrus font.. yep..

[Dreamer]

Include a bunch of confetti and say they're Temmie Flakes!!