Another complicating factor is whether you download the file or a page, print a page, or sign up for an emailed download. All three work, but some form of file will be most flexible. Usually you have to pay for that.
Most people will find a 25th Anniversary party to be a time for playing 25th Anniversary party games and printable activities while interacting with friends. Various types of games are ideal for a 25th Anniversary party; however the key to this party and others is planning games that compliment the party itself and add to the event. Therefore playing games such as Never Have I Ever and Have You Ever will add to the party.