The gift can be any asset offered on the hive-engine (but not devalued tokens from abandoned or struggling projects) or even hive, HBD. Whatever gift you send must be worth at least $1 and above.
If you want to send multiple gifts, you definitely have to send extra 1k WOO.
You must burn 1000 WOO for each gift you send.
Take not of this once more! You'll be disqualified if you send unworthy or devalued gift.
I'll advice you get into the WOO discord for more help.