I think the concern about a toddler getting hold of the balls and putting in the mouth is remote, but certainly possible, and we do have to take precautions even for the remote risks.  You could keep them sealed in a plastic bag much like the ones that Hollister gave out and tape the bag shut.  How about that plastic wrap I see advertised that allows you to seal a food item between two sheets.  You could seal each ball between large enough sheets that toddlers could not try to ingest.

Sure wish I had them when I was teaching classes!

Winnie

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