It depends on what you consider a "ten pound weight"...My daughter (in the style of most young girls) had a massive conglomeration on her key ring:

- every key she owned and a few that she had no clue what they went to
- a rabbit's foot - purple
- 2 troll dolls
- an I (heart) Rob tag
- a nail file
- a nail clipper
- a pepper spray holster
- a personal siren
- an old dog tag from her puppy
- her remote start/alarm fob
- a door entry card from her work
- her college ID card
- an Ipod shuffle
- a picture keychain with a picture of "Rob"
- a cow keychain that when squeezed would go "MOO"
- a vial of Jamaica beach sand
- a pen

Lo and behold, about a year after she got her Sentra, the ignition cylinder needed to be replaced...hmmmmm