Somebody please tell me what I'm supposed to do with , lottery tickets.
Every time I try using it , it says I have no space for the buildings!!

You should keep them since they are going to do a lottery to give prizes (monsters) to the winners.

I agree. I have the same problem with the Bithday tickets.

@Hestia03
this is not a problem , as the lottery event is over already , you can see them