Even though it is deep in the roots of the Tree, It's Tough to be a Bug!   is easy enough to find.   As you enter the park and pass through The Oasis to get your first view of the Tree of Life, bear left and you will run into this sign.   It doesn't always say that the wait time is 15 minutes, though, but don't let it bug you.

There is also a sign that says if you have a phobia of bugs, you might want to pass up on this attraction.   If at all possible, please see it.   It's fantastic!