I am from MA and we used to call them whirli-gigs, hehee. The proper term for them is samara. They will need to go through a winter before they are usable if you want to try to plant some. I have hundreds of Silver maple seedlings in my yard this spring. I took 7 of them when they got their first set of leaves, just before the evil mulch-men came for the yard upkeep... one has survived and lives happily outside in a window box.
If you are interested in trying one for bonsai, check this out...
http://www.evergreengardenworks.com/redmaple.htmhttp://www.evergreengardenworks.com/redmaple.htm