My guess is that you're asking about the Disney Character Warehouse. There are two locations - one on Vineland (very close to the parks) and another on International Drive.
I can't tell you if they're going to have children's earrings on the day you go. What I can tell you is that they carry different things all the time. So, while they might have certain earrings one day, they might sell out and that be it by the end of the day. Many people get there early in the morning, buy a bunch of stuff, and then sell it online. I'm planning on checking it out myself on my next trip.
Here is the yelp for the one that's closest to the park:
https://www.yelp.com/biz/disneys-character-warehouse-at-the-orlando-premium-outlets-orlando
Hope that helps.