Move over, baby name books — this kindergarten class just rewrote the rules of identity, one “Hello My Name Is” sticker at a time. Jordan Lake, a fifth-year kindergarten teacher, is going viral on Instagram after filming himself letting his pint-sized pupils temporarily ditch their given names in favor of something a little more … imaginative. “Letting students change their name for the day because they’re only young once,” he titled the Reel — and buckle up, because the results are exactly as delightfully unhinged as you’d hope. A kindergarten teacher handed out name tags — and accidentally unleashed a tiny identity free-for-all, complete with “Marshmallow” and “Ochy.” primarilykindergarten/Instagram In the clip topping 7.5 million views, a jovial Lake sits at his desk, armed with a stack of name tags and a Sharpie, calmly preparing for chaos. Spoiler alert: chaos delivered. “What do you want your name to be for the rest of the day?” Lake asks one student off-camera.…