You can make boomerangs entirely out of wood. I'll have to look at the magic boomerang.
The tutorial books for TC are great. The parts that I got through:
You make a schematic table (can't remember the table), stick blank schematics in and set patterns into them. Then you make a part builder, which allows you to use the schematics to turn raw materials into tool parts (pickaxe head, shovel head, tool rod, tool binding). From there, you combine the tool parts into the tool you want at a tool station (you can name the tool as you make it). At this point you have a finished tool made out of whatever materials you chose. You can make it out of quite a few materials, each one having it's own strength/weakness (e.g. paper pickaxe head bound with stone with a green slime handle). You can now 'modify' it by attaching other materials to it, such as redstone and diamond, which improve an aspect of the tool. Diamond increases the durability by 500, and nether quartz increases weapon damage. You can only attach so many things to a tool. When you're finished, you have a fully customized tool/weapon. Bonus, the weapon doesn't disappear when it breaks, it just becomes a 'broken' tool which you can repair at a tool station.
IMO it's very worth it to make tools (pickaxes, shovels) using TC.