The shelf in the first picture is made of red oak plywood. You can choose the wood type, color and design as you like for your project. In case if you need more help understanding this project, you can refer the source link below. It discusses various items used, steps and tips and personal experience of the author who personally built a Zigzag shelf.
A small oak table is a very useful wooden item for every household. You can yourself make a nice, strong and beautiful oak table suitable for any purpose. See the image below. As you can see, it is a small, yet good enough table to be used as a coffee table, lamp stand, breakfast table, etc. You can also find many other design variants on the internet. Choose the one you want for yourself and start making it now.
Building a Wooden Office Desk Organizer is an easy task for a professional woodworker, but not so much for normal people like you and me. But that doesn’t mean you cannot do this. Two years ago, I had almost no woodworking experience, but now I make most of my household and office wooden items by myself. This saves me a lot of money. And believe me when I say this; you can also manage to make wonderful wood items with a little practice and some woodworking experience.
This super-strong and simple-to-build workbench is may be the project you've been looking for a long time. You have to select some free workbench plans to create yourself a working table in your shed that after you can use it when you are working on your projects and maybe it can provide you some extra storage, depends upon which plan you are choosing to DIY.