Lead by example, don't chastise
start explaining things outside of being 'conscious' to gain trust and become their go to person for advice and knowledge. After that they'll be real open to hear anything have to say or will show them.
The lil homies have short attention spans, so it would be better to drop gems on em in the course of everyday life, they'll be receptive if it makes since and doesn't sound like hate or bitterness.
Keep it positive and upbeat if possible.
Straight facts and all knowledge....