NeeDoh squishies have gone viral. 'It wasn't intentional,' the CEO tells me.

The Nee Doh gumdrop squishy has a very pleasant handfeel.

Katie Notopoulos / Business Insider

• NeeDoh squishies have gone viral on social media over the last few months.
• They're made by Schylling, a 50-year-old Massachusetts company that makes vintage-style toys.
• NeeDohs are now hard to find. Now, there are knock-offs and huge prices from resellers.

Courtney Sullivan, a lawyer in Scottsdale, Arizona, was tasked with a mission: Her nieces in Texas wanted NeeDoh squishies...