GIANT mystery gift, what could it be?? Wrong answers only.
@Vidyala an empty box for a cat 😁

@Vidyala a Compaq 486 with Windows 95 installed, plus Encarta and Quake pre-installed...

...What year is it?

@Vidyala my thought (until I read the other guesses, loloops) was "board game", so I was go to guess
a Sega Genesis!