How to Teach Kids to Say the Big Words

i don't know if there is any research or anything that says that helps kids when learning sounds i'll use it because my consonant chart is set up with tongue placement and then airflow so i'll say okay this is a stop that means we can't hold that sound. Getting them to say fricative and know that is tricky plus when i first think that in my classroom they all start cracking up they think i'm saying a bad word. So yeah well i know there's there's some people that really love teaching it and this is all just from basically what i read in facebook groups  I would definitely want to say that that's not necessary for getting to know those big words