Do you own shaving cream? Ask an adult to spray some on a baking sheet. Draw a picture of something that contains your speech sound and say the word 10 times using your best speech sounds.

Boom Card: https://boom.cards/fastplay/qzua Pick 10 words with 1 of your child's speech sound in it, and say each 10 times while moving soccer balls to the net

Requesting: if you know the item your child is requesting, always model the verbal word before giving it to them, then have them try to verbalize or use a sign.

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Look up a sign: http://www.aslpro.com/cgi-bin/aslpro/aslpro.cgi