Tell us about yourself!
I also found out that when a piece of smooth cheap Masonite is put on top of the ramp, it's a great way to slide moving boxes down to the van. I also plan to use this ramp for my ebike on my van conversion - a heck of lot lighter than the commercial models and easier on my back.
After looking this project over, I realized that this is the perfect solution to get my ebike up the front stairs. It's around 60 lbs, but some of you have mentioned have dogs that weigh more than this. Cool idea!
This is already being done with crows- see link to an amusement park in France that has a murder of crows that pick up cigarette butts - http://mentalfloss.com/article/554401/trash-collecting-birds-keep-theme-park-clean-france.As for identifying and picking up other types of trash, see this TED talk that proposes a device that will train crows to pick up trash after stadium and concert events - https://www.ted.com/talks/joshua_klein_on_the_intelligence_of_crows/transcript?language=en
It occurs to me that a cheaper and easier alternative for the rings would be a pair of 4 or 5 inch plastic embroidery hoops, available at many craft and variety stores.
Most post office have automated mailing stations in front by the mail boxes.
Homemade Twinkie Challenge