I always work with materials that can be recycle. This is a experience make with paper pipes (that are used to store fabric, etc)
This is a strong material, and support a lot of weight!
Step 1: The Pipe
First, you need some paper pipes. You can found it in anywhere that work with plastic film, alluminium fold, fabrics.
Step 2: Cut the Pipes
Then, you have cut the pipe. I used a power saw , but you can cut with a hand saw.
In my case, I had a pipe with 130 cm (pipe 1) and another with 140 cm (pipe 2).
Then, I cut the pipe 1 in 4 pieces with 30 cm each (for the base -legs).
The pipe 2 was cut in 2 pieces of 70 cm (for the seat).
The ideal would be more 2 pieces to the base and more 1 piece to make the seat, but unfortunately I didn't have another pipe in my hands.
Step 3: Ajust the Pipes
After that you cut the pieces, you need choose a side of the each one of the base pipe and make a 2 semicircles (one opposite to other). This work to fix the seat pipe.
Step 4: Fix the Pipes
Then, you need fix the pipe seat in the base (2 base -1 seat).
I used hot glue, but you can use any glue that work with paper.
Be careful with the measures. Let a border about 5 cm before the base. If the semicircle don't fit exactly with the seat pipe, you can fill the empty space by using hot glue or even little balls of 'knead' paper.
Step 5: Multi-Utility
This is a base for more and more works. Depends your necessity or how many pipes you collect,
I don't make any ending. You can paint or paste rope to finish the piece.
You can make a sort of things. It's only a suggestion.
You can use like a bench, a table, a DVD support (increase the measure of 2 base pipes).
For example, large pipes can be used to make a bed.
Or playground toys or anything.
I have 2 large pipes that I use like columns and we to adorn in December.....
Use your imagination and good work!