Singing the alphabet song to your child introduces the letters to them in a fun way. Start singing to them as a baby and as they get older, have them start singing along (which they probably will do naturally!). My kids LOVE this CD by Discovery Toys that has a song about alphabet letters and the sounds they make. It really helped my kiddos learn their letters as well as the sounds. There are 4 other ways you can seen here: https://teachingmama.org/5-ways-to-teach-the-alphabet/
Kevin Johnson - Assignment Writing