How do you build a bench?
Need to know if it is a park bench or a work bench but either way your local book store or library has many books on that subject that will help you build one step by step.
Pour in concrete in 3 boxes ("concrete molds", you can buy these or make them yourself.) Join the parts with some more concrete, finish and install the bench. The total can be less than $20. If you prefer a wooden bench, the easiest way to do it is with trunks. If you want more specific answers, you'd better specify what kind of garden bench you want to build.
You can purchase or build a bathtub bench. Unfortuantely, there are no designs for a tub bench so the best way would be to pick your materials, if going with wood, something that will not splinter. Attach legs, a handle and back and you are done. You can see a picture at http://www.amazon.com/Bathtub-transfer-Adjustable-Lightweight-Rust-Resistant/dp/B000SOQ30E.
Go to your work bench, Now go into "other" And select the Axe, It will tell you what you need, and how much. Once you have your supplies, Go back to the work bench, Go into "other" (again) and select the axe, You can now build your tool. But if you sim is low on something (like sleep or is hungry) The will not let you build the tool!