My 4 year old also thinks he's going to be a Rainbow. Not helped by the fact that he went on an activity with them as I was going, and everyone kept saying "OK, Rainbows and DSname, you're doing this now".
Camp this weekend. Lovely time, Guides had a great time though complained when they abandoned their cooking fire and we didn't cook their lunch for them so it took 4 hours. All happy, lots of parents thanked us, one gave us wine and one flowers, and one put in a complaint to County. Mainly based on the fact that their daughter didn't want to do any chores and is a lying little madam.