Blends are tricky for some beginning readers. You can teach blending the letter sounds quickly together with magnetic letters.When practicing blends I suggest teaching a few at a time with similar sounds.
L Family - cl, sl, fl, pl, bl, gl
R Family - br, cr, dr, fr, pr, tr, gr
Starting with S - sl, st, sp, sn, sc, sw, sk, sm
Starting with T - tr, tw
Starting with C - cl, cr
Starting with F - fl, fr
Starting with B - bl, br
Starting with P - pl, pr
Starting with G - gl, gr
Three Letter Blends - scr, spr, str, spl
Here's a video showing how I teach blends with a beginning reader.
Look for books with blends. Nora Gaydos has a Series of phonics books with quite a few blends. The stories are interesting and fun. My children and the students I've tutored loved to read them again and again. You'll find links to these stories in my Amazon store.
Practicing blends can be fun. It will help your beginning reader a ton. Try a few a day. Let your child think of some words with different blends. Practice making words with short vowels, long vowels, and vowel sound phonograms (ee, ay, ai, ow, ou, oy, oi, aw, au, ew, ui, oo, ea, ar, er, ir, ur, or, oa, ey, ei, ie, igh, eigh, oe, ough, and eu)