The artist Andy Goldsworthy does most of his stuff in transient media. IOW, he builds stuff out of ice and leaves and sticks and sand. Sometimes he gets 90% of the way done and a dog runs over the work, or a tractor comes roaring through it, or it rains and the whole thing gets spoiled...yeah, I doubt very much the monks would have minded their mandala being spoilt.

That being said, the kid should have been in a stroller. I gots me a toddler and damn, they move fast.