Will these blocks fall?

Today, Felicity asked to play blocks.she did one, then wandered off. She returned after I'd added some more, so I asked her if she liked my tower, to which she replied "yes."

"Does it look stable?" I asked.

To which she replied with one big swoop of her arm. Answering without any words whatsoever, that my tower was not stable.

Toddlers, right?