Goalkeeper question for under 7s

Hi i am the Coach for the under 7s i know the new rule with throw inns are now pass or dribble but just wanted to check about the rules with the Goal keepers. For a dead ball i know they take it to the edge of the box and then pass it but if they pick it up during the game/save it etc. can they throw it over head, under arm and from what i have seen can do a drop kick/half volley is that correct? Thanks