How Many Girls Do You See in This Photo?

PHOTOS: Puppy Smiles While Being Rescued From Burning Apartment

A Canadian mom said she was moved to tears by a birthday party invitation for her son with special needs.

The invitation included a note from the mother of the birthday boy named Carter, expressing their family's desire to accommodate 7-year-old Timothy Klein, who was diagnosed with non-verbal autism when he was 2.

The note from Ainsley Peikos read:

"Carter sat beside Timothy at school and he always talks about him. I really hope he can come. We are renting a bounce castle that we can attach a small bounce slide at the bottom. We will also have water balloons and water guns. Maybe Timothy can come earlier in the day if it would too much with the whole class. Let me know so we can make it work."

Timothy's mother, Tricia, said that getting the invitation was a "wonderful moment."

"Yes, I was shocked that someone would take not only the time to write the note, but to be considerate enough to include him with all of his difficulties," she told ABC News.

She shared the note on her blog, The Book of Timothy, but it began circulating on social media recently. She said Timothy had a great time at the party.

"I want only one thing for our kids--for all kids really, and that is inclusion," she said. "All they want is to feel included and accepted for who and what they are--that different is's just different."

Ainsley said that she didn't think twice about inviting Timothy to Carter's birthday, since the boys had become such good friends.

"The only question was, ‘How could we make it work so that Timothy could come and have a great time just like anyone else?’ ... I love knowing that one note gave her the ability to go on another day as she continues life with Timothy."

Grandfather Asks for 98 Facebook Likes for His 98th Birthday, Gets Thousands

7-Year-Old Boy with Incurable Condition Becomes Honorary USCG Member

Dog Who Was Abused and Lost Both Eyes Gets a Loving New Home