Biplanes typically cost 30,000 coins and help you instant grow all of your crops. Instant Grow costs Farm Cash though, so just owning a biplane isn't enough to really utilize its benefits. The new AVG biplane acts the same as the old one, except it has the AVG logo and colors on it.
You can find out more information on the promotion page here. The offer is good until March 2nd at 11:59pm EST.
Did you buy the AVG PC Tuneup? What do you think of the software, was it worth it? Let us know in the comments!