Ana,
A friend of mine recently bought a kit to make outdoor benches that convert to tables. She built eight of them for her daughter's elementary school garden. They look like this:
http://www.gardeningwithkids.o.....-1424.html
If you push two together when they are converted to tables, it makes a complete picnic table. They are incredibly cool. However, when you purchase the hardware, you still have to buy 2 X 4s to complete the project.
I've often wondered if these could be built entirely of lumber. Wouldn't you know:
http://www.alloutdoorbenches.c.....onvertible
Nice! For the low, low price of $299.99, on sale. Each.
It would be great to have plans that allow for different bench lengths, perhaps a range of 5' to 8' long with inexpensive lumber (doesn't have to be stain-quality; these are perfectly paintable).
PLEASE, ANA, PLEASE, will you try them? Do it for the kids!!!! And the handy grown-ups who love kids!!!! 
Thank you!!!
Amy K
Burbank, CA
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