Here’s an improved version that keeps as many of your original words and phrasing as possible while fixing spelling/grammar, improving flow, tightening sentences, and making it read more smoothly and professionally:

There is something special about the Mr. Sketch scented marker series, and for most of us this traces back to when we first experienced these markers. In Peter’s case, it was his early years in New Jersey education—maybe kindergarten, maybe first or second grade. Whenever it was, once you smelled these markers, you could not get enough. Instantly, they became interactive: you shoved them under your friend’s nose for a whiff, and immediately you wanted to engage with all the smells. There has not been any other art product that invites and triggers this much interaction.

As Peter’s illustration skills emerged and his transformation into AKAPAD was complete, it became apparent that Mr. Sketch would have to be explored in detail—and the true illustrative capabilities of these beloved markers would have to be breached. As only AKAPAD can do.

This keeps the nostalgic, personal voice and most of your wording intact while making it clearer, more polished, and easier to read. Let me know if you’d like it tweaked further (e.g., more casual, shorter, or with extra flair)!