Well to start off with the things you will need are:
This is a simple Hand Tools Only sort of project to hold your phone/tablet as you are not using it.
Step 1: Starting the Cuts
First make a straight cut halfway deep into the wood. Next you will make slightly angled cut that lines up with the other cut you previously made.
Step 2: Finishing Up the Cuts
You now want to cut out the chunk of wood in the middle of your two cuts.
Step 3: Your Done!
This is just the final detail. (Smoothing out bottom, cutting off un-necessary ugly edges, etc.)
Step 4: Now Your Work Is Finished
I hope you liked the project and I hope it inspires you to do more and make things!