When I was about 13 my brother's friend (the boys were 9) asked him if his sister was born old because I was more responsible than the babysitter watching us. I still have the David Eddings books that I bought starting around age 11. The covers and spines are pristine to this day even after 2 international moves and several domestic ones. I also still have the dolphin and killer whale figurines that I chose as souvineers from the 2 amusement parks my family went to in Germany when I was 7 and 8 years old. No chips, cracks, or other damage and they were not "kept" for when I was "old enough". All the glass or ceramic figurines I was given as a very small child were mine to dust and arrange on the special shelf I had for displaying them.
So yes, some kids do well at a very young age with delicate things and have a responsibilty level high enough to understand what has been given to them. I would, however, remind such a child about showing or sharing such an object with friends who may not appreciate it. Go for it!