Children are lively and require the greatest attention of adults, especially in the developmental age. The responsible persons are the parents, grandparents and preschool teachers of the nursery. For the children safety, it’s important that people in their environment know the basics of first aid. The most common injuries are broken bones, falls, head injuries, drowning, burns, cuts, swelling and bruises, foreign objects in the eye, choking, tooth injuries and insect bites. These injuries can’t always be prevented so it’s important to know first aid and respond timely. Broken bones, falls and head injuries are mostly occurring in nursery or at home, but they may also happen inside, so it is important to protect all the sharp surfaces in your child's environment. Drowning isn’t a most common in nursery if the children don’t go to the swimming pools, but it may happen at home if the children are left alone in the tub or in the smaller pool. As for burns, inattention of adults is most common reason for them to happen, because a child can burn himself if someone leaves a hot liquid on the table or isn’t familiar with setting pots on stove so that the baby can easily reach. Cuts as well as swelling and bruising occur as soon as a child falls and scratches or tilts to the stone which he has found on the road, but if the incision isn’t deep there is no cause for concern and it can be solved by mild wash and putting the patch, while on the swelling and bruising is enough to put a cold compress to reduce and relieve pain. How children run, they can catch something in the eye because dust and other impurities fly by air. If reaction is timely, there’s no cause for concern, but if the object is too deep it is necessary to seek for medical attention. In younger children who world exploring with their mouth, choking with smaller objects or food is one of the more serious injuries, and when comes to that, person need to be calm, timely and properly react. Usually the children don’t listen to their preschool teachers when they tell them not to run around the room, and that is said for a reason, the room is full of tables and closets where the child can hit and hurt any part of the body, and so the most affected are teeth. When that happens the tooth should be stored in the milk and taken to the dentist who would try to bring him back in gums. Stay in the air is the best exploration for children, then the insects can bite them. Because of the possible allergic reaction, the child should be taken care of, and the place of bite should be applied with a unguent or a cold compress. The child in ourselves should never be forgotten and new generations should be allowed to explore the world and if an injury occurs, it is necessary to react calmly so that the injured child and other children around him aren’t frighten.