Hopefully it's not rough and bumpy

So my in-laws came over yesterday. While to some people this would be cause for concern, my in-laws are genuinely great and we love having them over. This particular visit, they brought boxes full of old toys. My mother-in-law used to teach young children, I think kindergarteners, so she has lots of old supplies that she's now passing on to us for Molly and second kid. I go to the back of their SUV, grab a box, take a step toward the house... do a double take, and look back inside the trunk at the box labeled, exactly as written, "ASS WOOD BLOCKS". I ask my father-in-law if there's something I should know; he looks, chuckles and tells me I'll have to ask his wife. So we bring the box inside, I set it down and turn to my mother-in-law and say, "Do you mind my asking what that first word means?" She looks at me blankly and replies, "'Assorted.' Why?"

Oh, to be that innocent. So if anyone needs blocks made of rare wood taken from the fabled ass tree, we've got you covered.