It's A-tin

Ashton pronounces his name "A-tin." So... here's A-tin playing peek-a-boo... I see you!

Playing with "co-dor" (interprets as colors which really means anything that writes. In this case, sidewalk chalk).

Ashton also can't say "s" but knows that they are part of the word, like airplanes or balloons. So he replaces the "s" with a "t" and therefore airplanes is airplanet and balloons is balloont. It's cute because he really emphasizes the "t."