Two age thresholds
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The marble statements
CHOKING HAZARD--Marble. Not for children under 3 yrs. And CHOKING HAZARD--Marble. Not for children under 8 yrs.
Same object, two thresholds
Which depends on the article and on the age range the toy is for, not on the marble itself being different.
The small ball statements work the same way
Not for children under 3 yrs in one version and under 8 yrs in another. Two statements for one kind of object.
And the small parts statement has one threshold
Not for children under 3 yrs. Which is the general case and the one most people have seen.
So the six statements are really four hazards
Small parts, small ball, marble and balloon, with two of them doubled by an age threshold.
The balloon statement has only the under 8 version
Children under 8 yrs. can choke or suffocate on uninflated or broken balloons. One statement, one threshold.
Which makes the under 8 threshold the broader one
It appears in three of the six: small ball, marble and balloon. Under 3 appears in three as well.
Choosing between them is not a judgment about the object
It follows from the article and the toy's age range, which are facts about the product rather than about the hazard.
And getting it wrong prints the wrong sentence
Which is the consequence. A prescribed statement is either the right one or it is not.
This group has a marble leaf and a dice leaf
Marble collection and dice set. A die is not a marble and is a small part, so two different statements are in play across two adjacent leaves.
And a game token is a third case
Flat, small and not a ball. Which is the small parts category rather than either of the named-object ones.
So three leaves, three possible statements
Before the intended-user question is even reached, which is the next section and the one that decides whether any statement is required.
Read the article first, then the age range
Which is the order the six statements imply.