Wow! Reading through all the replies, I can see all the different points of view. Personally, I think it sounds fascinating and I can easily imagine that my biology-loving dd would have wanted to see this, even at age 4.

Is this something you could talk with her about? Does she have the maturity to understand why you might not want to include her this time? Can you prepare her in advance for what she will see, hear, smell, etc?