The Alphabet - Hearing sounds in words
I encourage you to use the phonetic sounds rather than the letter names A (ay), B (be), C (sea) when talking to your children. This video shows the correct pronunciation. It is important to say the phonemes clearly and not add an 'uh' to some (e.g. 'sssssss' and not 'suh', 'mmmmmm' and not 'muh').
Jolly Phonics Letter Sounds (British English) https://www.youtube.com/watch?v=-ksblMiliA8