There's no reason why 10-16 yea olds should carry tampons - in fact at this age tampons aren't recommended, and certainly not for the first few periods. Girls of this age should carry menstrual products with them in case their periods start, as they can be irregular at first they don't know when their periods may start. It's also a good idea to carry supplies with you to help your friends out too.
Yes they should
I think you mean 12 YEAR olds, and I don't think they should... It's really dangerous
physically they can handle it fine, there are dogs heavier than 2 year olds that 17 year olds carry with ease, obviously you'll have to be careful though, but as long as you're careful I'm sure everything will be fine. Besides there are loads of 17 year olds that are parents nowadays anyway!
no
food.
yes
If he or she is mature
yes
Slim.
The lab should be able to.
Yes if you are good enough
the secret that all seven year olds should know is you are tough adoults dont have the right to boss you around