I have seven grey tree frogs at the moment, and they are about three weeks old. I got them just out of the tadpole stage. Grey tree frogs have the ability to change color from grey to green to brown, depending on what surface they are on, and are often referred to as the "chameleon" of the frog world. I have my guys in a twenty gallon now, and on small crickets.

If you don't know this already, your little guy should be eating anywhere from 1-3 ten day old crickets every day or every other day. Pinheads work, but he'll need to eat more of them. Make sure you get a calcium powder (I use rep-cal) to dust them with. With any luck, he'll be his adult size within the year (anywhere from 2 to 4(!) inches).

Good luck, I hope this helped. :]