What is this?
It's a birthday card
What is this?
It's a birthday cake
What are these?
They are candles
What is this?
It's a gift/ present.
What are these?
They are party hats
What are these?
They are balloons,
What is this?
It's confetti.
What are these?
They are candies.
What are these?
They are cupcakes.
What is this?
It's coke.
What are they doing?
They are singing "Happy Birthday" song.
What is she doing?
She is making a wish.
What is he doing?
He is blowing out the candles.
What is she doing?
She is cutting the cake
What is he doing?
He is opening presents/gifts.
