Hello and welcome to fishlore...
Im sure your daughter must be very excited at having fish and its a great hobby to start young.

May I suggest that you do at least a 50% water change at this point to get the ammonia levels down. Since you didnt cyle the tank before introducing fish, the only thing you can do now is manage the water perimeters with fish. The safe way now is to maintain water changes and continual water testing to see what the readings are. Be sure to get the water temperature as close as possible to the temperature of your tank when adding new water. Im assuming that you have a heater in the tank? Im sure that others here can give you additional advice, and good luck with your fish tank! ~ kate