Lots of people have experimented with just about any type of fuel you can imagine, and many of them have written in the forums here about their experiences. Most alternatives to stick wood require some type of feeder, and there are plenty of variations if you search the forum for a particular fuel.
I child proofed my house but they still get in. Distract them with this tiny ad:
grow your own garden and build your own home, in Montana, for free-ish