Cute little guy you got there, I'm picking up one tomorrow myself. The White's Tree Frog is one of the few types of frog that isn't in too much danger from being held occationally and can become quite tame and fun to play with, and they get rather large and can learn to croak/sing on command. They also can live up to 15-20 years if taken care of properly.
You can also manipulate their colours by changing their enviroment, if you keep their temps lower with high humididity you get this brown here, but if you raise the temp and lower the humidity then you get a bright green or blue.
I hope you enjoy your new White's, they can be loads of fun.