We got there a bit late so a full package of a day pass w/ Mind Museum access is not option. We've been inside as well so I don't think we are missing anything. So anyways we got in, and even if the exhibit have been running for quite a while now, there are still a lot of people in.
The exhibit features replicas of Da Vinci's works- ranging from his inventions to his artworks. And unlike most exhibits a lot of the replicas on display are okay to play with.
They also have a 1 hr presentation (looks like it came from History Channel, I'm super sure I've heard that narrator elsewhere) which runs every hour so you may want to catch that to sit a bit. When we came in some chose not to stay but I didn't regret the hour.
The exhibit runs for 3 months and if you have more time to spare, go get the full package. It's entertaining and informative at the same time.