K.M.
My daughter was a little over 3 I think. She's 4 now. She loved swallowing the toddler toothpaste too. We talked a lot about how big kids use big kids toothpaste because they spit it in the sink. I pointed out that the older kids she knew did this. It seemed like she would never master this. We'd walk by the toothpaste section at Target and I'd point out the Disney Princess toothpaste which was for big kids who spit their toothpaste out when they brushed. "Don't worry T. When you are ready to spit out the toothpaste we'll buy the big kid kind." One day we were in Target and she said out of the blue, "Mommy, I'm ready to start spitting out my toothpaste." So we bought the big kid kind and she's done great with it ever since.