Thought to send an update......After a week of covering the tank, one of the frogs was visible, but stayed hiding in the plants. Crickets disappeared during the night, so I assumed it was eating. The second frog however, didn't appear. I was worried that it had died, but after 2 weeks it appeared quite suddenly. My daughter, when she misted the tank in the morning, was surprised to see it clinging to the glass. Since then both frogs are active and are found out on the glass. After our devastating frog loss last year, my daughter has had a hard time adjusting to the new frogs. She didn't even know if she wanted more, and is scared that they will die. She is now smiling again! Thanks again for the advice!