If the kids hair cut at home, always use professional hair cutting scissors to produce a clean cut otherwise with most other scissors, your child's hair will break at the ends and this will result in the points open and spoiled.
Most of the time the parents decide to cut bangs for their children by themselves and it may seem like a simple task, clean cut and straight line is not always easy.The best way is to cut the hair when it's wet but since wet hair stretch longer it is also easy to cut too much off. On the other hand, cutting dry hair is much easier but it's more difficult to get the hair strands under scissor to create a straight clean cut.