Children saying Modeh Ani:<a href="#_ftn1" name="_ftnref1">[1]</a>
It is the custom of righteous women to recite Modeh Ani on behalf of, and together with, their baby even prior to him learning how to speak.<a href="#_ftn2" name="_ftnref2">[2]</a> Even those who don’t do so, are nonetheless accustomed to teach the child to say Modeh Ani starting from when the child learns how to speak.<a href="#_ftn3" name="_ftnref3">[3]</a> Certainly, from age 3 and onwards every parent is to make sure that their child says Modeh Ani upon awakening.<a href="#_ftn4" name="_ftnref4">[4]</a>
<a href="#_ftnref1" name="_ftn1">[1]</a> Toras Menachem 5742 2:816; 5749 2:37; Shevach Habris 3:35
<a href="#_ftnref2" name="_ftn2">[2]</a> Toras Menachem 5749 2:37
<a href="#_ftnref3" name="_ftn3">[3]</a> Toras Menachem 5742 2:816 that so is the custom today of all Israel
<a href="#_ftnref4" name="_ftn4">[4]</a> Toras Menachem 5742 2:816; See Igros Kodesh Rayatz 2:438; Brought in Hayom Yom 4th Iyar; Sefer Haminhagim p. 87; Igros Kodesh 5:21

Shulchan Aruch HaRav | Children saying Modeh Ani and Saying it together with ones infant

Children saying Modeh Ani:[1] It is the custom of righteous women to recite Modeh Ani on behalf of, and together with, their baby even prior to him learning how to speak.[2] Even those who don’t do so, are nonetheless accustomed to teach the child to say Modeh Ani starting from