It seems like your question is incomplete. Could you please clarify what specific activity or topic you are referring to regarding when kids started doing something? This will help me provide a more accurate answer.
When they realise that life is hard.
They see adults doing it, so they start to emulate those that they look up to by doing it as well.
usually it is a habit sometimes for kids but they do when they are nervous or just doing it on purpose but sometimes they don't realize that they are doing it. Also don't bite your nails because it can give you a disease.
They will probably start doing so around age 14 or 15.
It started in 1987! WOW!
yes it is as long as you trust your kids not to talk to strangers and as long as they are not phsycho then they wont go around thinking blood is cool and start doing drugs because they saw a movie character doing it
If you meen halloween, then it's not our national holiday, but there are people, mostly kids, that are doing the same thing that they are doing in the U.S. For them it starts at 30th October
Kids should be able to use them when they are more careful with what they are doing. I think I started to use them between third and fourth grade.
bullies are either saying mean things or hitting and pushing someone around. This can affect someone, because they can start believing what is said about them and or start fighting back and they can start doing things such as drinking and smoking to make the pain go away
he let sick, dieing kids come over to never land to have fun, but then people had to start accusations and he quit doing that.
Your Baby Can read is a good program that will teach very young kids to read. By doing this program they will have a big head start on all the other kids in preschool.
when they start doing something maybe chores or mowing the lawn even pulling weeds or when the get strait A's in class