The change begins

Jon pondered for a bit as held a few blocks, unsure what to spell out. He felt a bit silly for a moment, getting so into the blocks. If anyone from school ever saw this... and then the word came to Jon. Maybe not his first choice, but it wasn't like he couldn't change back, right? Besides, it was the first word he'd really thought of, he might as well pick something already. He set the four blocks down, one by one, till it made out... **NERD**.