Invite the Scouts to a video conference then share the PowerPoint.
The Scouts can either work individually, or (if using Zoom), put in teams in breakout rooms to answer questions.
If using breakout rooms, you will need to have 2 leaders in each room. Each leader will need a copy of the PowerPoint and the ability to share their screen.
Tips and gotchas:
We recommend that you practice using breakout rooms before attempting it live!
The grid reference round in particular is a good training aid and can be used on its own.