Get on here or youtube and find videos of apparatus responding to calls taken from the cab. Put a sheet up on the door in front of the apparatus you decide for the drill to use as a movie screen. Use a ppt projector to project it life size onto the sheet. Put your juniors in seats takimg turns in the officer seat. Have them each do size ups on the scene in front of them. The ones in the back seats jump off the truck and grab a tool that they would use on that scene, name it, describe why theyicked that tool, what it is used for amd why they would use it. If they cant do that, have them research the tool as homework until your next , meeting.  Record the sizeups. Hotwash after they are over with how to improve.

i know its old but heres some more input

sign-off books, decals, patches

sign-off books for tasks learned (signed off by different members)(at least 5 times) when they have displayed proper methods including communications skills.

decals for their helmets,and patches for jackets (awards for training success)

and at monthly meetings announcement of levels earned for the recognition.

making things fun to learn is great but getting recognition for what they've learned is priceless to a junior firefighter.

heres a neat link

https://www.netknots.com/rope_knots/rescue-knots

many of these knots can be made quick release by looping the tail end of the rope back through.