Hey.
Does he know that they're nocturnal and not very active? There's a care sheet in the Tree Frogs section: http://www.frogforum.net/showthread.php?t=251
I'd recommend the tallest tank you can find (24'' is good) with something to climb in and places to hide. Also a water bowl that's regularly changed with dechlorinated water every 1-2 days.
A thermometer and hygrometer. Some way of heating the tank if necessary whether it's a heat lamp or heat pad. Maybe even some way of cooling it depending on the temperature of your house.
Some kind of substrate on the bottom: coconut coir (it will need to be changed as needed, probably monthly),
or paper towels (will need to be changed pretty frequently),
or a live plants tank with atlanta botanical garden soil and a false bottom or LECA clay below that. Also lights for the plants. (initially more expensive, won't need to be changed or cleaned for years unless the frog gets sick),
or a layer of water too shallow for the frog to drown in (needs a very small filter, treat like a fish tank but you don't need a water bowl. Make sure there's places to climb out.)
UV Lights: It's controversial, but some people would argue that even nocturnal animals like red-eyes spend time basking and need UV. There's some evidence for this.
Because of lack of variety in diet some kind of calcium powder with vitamin D for bugs is important.
As for the poop, frogs go right where they are.There's not much you can do about that.