Samuel and up

As we have noted in other posts Samuel is lagging in language skills for the average 18 month old.  We joke that this is because he is in a trilingual(French, English english and American english) environment.

Because of this we take every opportunity to try and teach him new words.  A word we are currently emphasizing is up.  Samuel constantly is walking up to us with his arms outstretched wanting to be picked up.  When he does this we ask him "Do you want to be picked up?".  His usual response is to continue to stare at us and then he places his feet on top of our toes and stretches his arms even higher into the air.  Is it glaringly obvious that neither of us should be teachers as our 18 month old thinks that up means stand on our toes.