This is an idea I've had for a while now, originally was going to have Tenna turn on his screen and show a birthday cake to Kris to blow the candles but I thought Asgore being the one to do it made more sense, Tenna still showed something on his screen though, so it's kinda like both did it XD
I love, LOVE the idea of Tenna adopting some Asgore and Toriel mannerisms, so I made Asgore do a similar expression to Tenna's whispering sprite.
Him having a little party hat too, I like the idea that Tenna is a bit of a character Asgore made up of the TV to play with both his children.
I also gave younger Carol a slightly different haircut, I wanted to give her bangs that kinda look like a pine tree branch lol.
So yeah, really wanted to give it a very nostalgic vibe, I myself really miss the birthdays or holidays we used to have in the family when I was little with all my cousins, uncles, aunts and grandparents, now we don't really get together like that again for various reasons, cousins have their own families, left to live far away, some family members are not in good terms with each other and stuff.