Gift which can be sent in pieces and reassembled at the end

Hi,

As the Friendship day is coming, I am willing to gift to my friend but in unique way, where I can send the same gift in pieces(with intervals) and can reassemble it at friendship day and can capture the happiness when the pieces combined and takes the shape with complete usages and functionality. May be for example, RC-chopper which can be assembled, some other electronics, in short can be dismantled and then re-assembled completely to working state easily. Can anyone suggest some gift which can be sent in pieces and can be reassembled? Google didn't helped much so thought to hit the forum.

Thanks,