Jesus teaches about giving, praying (the Lord's Prayer), fasting, trusting God rather than worrying about money, and seeking first God's kingdom.
God sees your heart — give, pray, and trust Him quietly rather than for show.
The Lord's Prayer is in vv9-13. Jesus also addresses anxiety directly in vv25-34 — perfect for children who worry. The birds and lilies (vv26-28) are wonderful illustrations of God's care.
You can talk to God every day. He already knows what you need and He promises to take care of you.