Connecticut state police say Edwine Louissaint of Dedham and David Augustin of Milton face charges including second-degree reckless endangerment.
Police found the children Thursday after being called to a garage at Foxwoods Resort Casino in Mashantucket.
State police Lt. J. Paul Vance says video surveillance and gambling records showed Augustin and Louissaint were in the resort for more than an hour.
Court officials say Augustin was ordered held on $40,000 bond Friday, while Louissaint was released on $25,000 bond after she promised to reappear in court.
Neither defendant entered a plea, and it was unclear whether they had attorneys. A home phone number for Louissaint could not be found.
