Thanks, both! I didn't get him finished last night in the end because it occurred to me that the weather would allow outdoor D&D today - and that required a swift switch from theatre of the mind to a miniatures-based session with Gulakeel, Lord of Manticores. In Friay's session, the party had just heard him calling to them in a little girl's voice as he crawled up the wall of the ruined tower in which they were resting. So, I got out the tin foil and the Fimo last night, then greenstuffed him in secret this morning and got him painted up in the early afternoon.
My son knocked the ruin together with cardboard and hot glue, and we were all set - and we even managed to squeeze in a two-hour game of The Battlefield before the D&D session began.