Hello, Mr. Baik Sungchan.
Thank you for invite me to Science Festival in this April.

I surely participate in this festival, so currently I am preparing to
my experiments.
At that time, I have a question about this festival.

Can I make any cooking for it?
and can I give any foods to guests about this event?
I'm planning about "Color-changing Ttopokki" and "Color-changing
Takoyaki" on this festival.

I'm waiting for your reply.
Best regards,
Yamamoto