A letter to "Grama"

Last week my sister's mother-in-law brought over gifts for the kids. She gave them each a new bathing suit and a pair of goggles. They were ecstatic! For his writing lesson today I had Owen write a thank you note. He was very frustrated by my spelling of the word "grandma." He insisted that it did not have an "n" or a "d." He kept sounding out the word to prove his point. I tried to explain to him that you can hear the "n" and "d" sounds in the word but he thought I was sounding it out incorrectly. "Mama, it's pronounced gramma, not graNDma!" He reluctantly spelled it the correct way only to write it his way underneath. He's a thinker!