Wood needed- I used one tall, fairly straight, Birch tree about 25 feet of wood from 1-1/2 inches wide to 4-1/2 inches wide.You could use two or three small trees of any kind about the same width.
Ten- 14 inch long by 1 -1/2 inch or so wide
Two- 2 foot long by 2 to 3 inches or so wide
Two- 4 foot long by 3 to 4 inches or so wide
all widths and lengths are approximate
Drill ,battery power shown but a hand cranked Brace will work
1 inch Forstner style drill bit- [any 1 inch drill bit will work but a Forstner works best]
1 inch Tenon Cutter- [ Veritus 1 inch Tenon Cutter is what I have]
Glue - [the wood glue has less fumes but I find Original Gorilla Glue on damp wood holds best over time]
Sponge -slightly damp if using Original Gorilla Glue
Sanding block - my sanding block is made from a belt sander belt [package of 8 pieces] then cut a board so the sanding belt fit around a 1/2 inch wide block of wood .
20 screws ,3 inch long Wood Screws are best but any length, as long as, or longer than 2 inches should work. [if you haven't tried the square head screws try them now they work great].
If you use screws you need a pilot hole drill bit [it keeps the wood from splitting] a counter sinking pilot hole drill bit is shown here [meaning when finished the screws head is countersunk or deep in the wood where you don't see it].
Drive bit [try the square headed driver bit it holds screws on the bit better and wont strip out the head as easy].