For those children who just don't have the finger strength to open scissors, try self-release scissors.  Here is one example of this type of scissors.  The idea is that the child squeezes the scissors to snip, and the scissors pop back open so the child does not have to open the scissors.  He can then continue squeezing to cut, thereby learning the other aspects of cutting, such as scissor progression and hand placement. There are many different types of these scissors and some are not very expensive (I have seen them at the Dollar Store).  After strengthening the child's fingers, transition to regular children's scissors (if able).