Think age appropriate
Conversation should be tailored to match the child's age and information should be shared simplistically on an age-appropriate basis.
Until the age of seven or eight these conversations shouldn't be broached unless the child comes to you. Try to ascertain how they feel about what they have heard or seen by asking questions. Are they curious or are they afraid?
Take concerns seriously
If your child approaches you to talk, try not to use phrases such as 'don't worry about it' or 'don't be scared'. They have approached you because they may already be scared and this might make them feel invalidated or dismissed like you aren't taking their concerns seriously. Reassure them that there are specific measures in place designed to keep them and their family safe and ensure they feel loved and supported.