Make Do

I found a hand trowel, which, while being barely bigger than my son's hand, would do.

I found an open patch of grass and moss, which, seeing as it was by a babbling brook, and was a big bigger than my son's body, would do.

I found the digging easy, which, considering how little time I had, plus how distracted I was, would do.

I found my son where I had left him, which, considering no-one was watching him, would do.

I hope if you go to that babbling brook, you find that patch. As a playpen, it will do.