Well, eventually I do deliver. Here are Benny and Sadie's contributions to the "Let's Go to the Hop" show at the Art of Dance Academy, filmed during the dress rehearsal by their unlikely-to-hop but happy-to-watch mother.
Benny as Elvis:
Sadie in a poodle skirt:
The most horrifying sewing task I have ever attempted modelled by the most awesome tap dancer in the known world and his beloved ballerina sister: