Hey:
You're going to LOVE the darts if you want to see action. I've had Tree frogs, toads anoles, turtles and Darts are the most interactive of all.
The foam background really is the ideal way IMO for a more permanent tank. I have only 3 tanks presently, but the one that prospers the most by animal reproduction and by plant life is the one with foam. While all substrate, interior wood and plant life continues to breakdown, change and need replacing the foam has served nicely as a permanent fixture in the tank by which the most moisture resistent pieces of wood have had a sturdy anckor to keep them fixed. In other tanks, where I had used the silcone bark pieces to glass method, the wood was always in need of maintanence within a couple to 3 years. The foam is so sturdy for the dart frog environment and my smallest(Imitators)live in this tank without a worry of shifting pieces of wood. They are reproducing like mad inside now. I find new tads weekly.
Black Jungle has the best step by step including supplies to add wood(pick the most water resistent if you add it to the back ground though), plant pockets into the foam, and water hose splitter if you want to add a dripping area to the background and additional liveliness to the "ecosystem" on top of the livelier frogs. I have never gotten bored with all that happens with these frogs, the plant life, the ecosystem with this method of keeping as I had too wished for more to interact with when I had no darts only tree frogs, toad, and limited plant life tank.
Show us your masterpiece!
Maggie