I am saving state quarters for my daughter. I have noticed that some of the quarters are getting a bronze look to them. I don't know if it is the entire roll or simply the ones on the end. I have placed the coins in the squared plastic tubes and then in old army "ammo boxes". I desire her being able to take them out in 20 to 30 years in brilliant uncirculated condition. What is the best way to store them?

My bff is challenging me to escape from a plastic tube approx. 4 ft. in diameter. I cannot carry any sharp items or tools that might be used to cut the plastic. If i get out in less than 2 hrs. then she will give me $400 in cash. I really need the money for my two kids. HELP!

I added a bit too much Oil into the engine, so I decide that I would be able to suck the oil out with some tubing. However part of the plastic tubing fell off into the dipstick hole and it possibly in the oil pan now. I call some mechanic, and ended up having some say that it will damage the engine and some saying that it will not effect the engine. Can someone give me a more in-depth explanation. On how I can remove the plastic tubing? and How is will effect the engine? Should I even drive it? I would also like to add that the tubing was about 5 inch long and 2 mm wide

This would require a groove on the inside surface of the tube, about 2mm from the end. I have looked into collapsible core technology, but unfortunately this would only work with larger diameter items. The item would need to be manufactured in large quantities, in the tens of thousands, so machining would probably not be an option. The plastic is fairly hard, so the core could not be removed without damaging the part. Any ideas appreciated.