The foal plodded on, watching--everything, yes, but mostly because he didn't know what he should be looking for. He stayed, therefore, vaguely alert: watching for danger as they moved on.
"...It is scratchy, I guess," he agreed, after some consideration. "At least, most of it is. And pretty dry. And it has sharp edges. But the stuff by the water was nice--softer. Um. Bunchier?" he ventured, wondering how to explain the difference between soft, round clusters of water foliage and the long, sharp points of desert grass.
"You're different than anyone I've met," he told his sister, companionably. "Everyone else" (which, it should be noted, consisted of exactly two other sapient beings) "was bigger, with--four legs, and fur." He squinted, vaguely, as he recalled the camel he'd met--and then winced as the scabbing wounds around his eyes tore, a little, at the gesture. And managed to refrain from a second wince when the first one also hurt.
He took a moment to gather himself against the pain, which was, by now, a constant; and he plodded along dutifully beside V. "But then the spiders and things--the scor... scorpions. They have a lot of legs. But you don't have any?"
Prime observational skills again on display, the colt eyed V sidelong, curiously. "You have nice. Uh. Skin? Though. Scales? It's very... They're very... pretty." He scrunched up his face, trying to think of the words--and winced again. And then winced at his wince.
A moment again passed.
"Like-... little jewels. Hey, maybe your whole skin is rocks!" he exclaimed, with sudden inspiration. "You know, like my head? But your whole body! Tiny gemstones!" The foal swivelled, cantering and spinning so that he could walk backwards alongside V for a moment, peering down at her wide-eyed.
And then, in a phrase that would be devastatingly rude in other contexts unknown to the little foal, he blurted--"Are you hard?!" He half wanted to lean down, to nose velvet muzzle over scale and see if her body was like a thousand tiny emeralds, or if she was soft, like fur, or something else entirely.
Again he spun, now back to face the other way. He'd drunk, and eaten, where V had not; childish energy rippled through him, and he danced a little caper along the stone.