Strong boy

One of the books we're reading quite a bit at the moment is Dinosaur Roar - which Charlie loves because he can remember it all and 'read' it to me without any help. We also do actions/sounds for them all, and one is "Dinosaur weak, dinosaur strong, dinosaur short or very very long." We faint a little for 'weak', make a right angle to show our bicep muscles for 'strong' etc. There was also a Boogie Beebies on recently which included the same 'strong' action and now he's started to say "I have got very strong ears!" All this time I presumed he realised what we were doing when we did the action, but he thought we were pointing to our ears! He does have strong ears though, especially when food is mentioned in a whisper!