My nephew recently visited us for work experience as he is interested in pursuing a career which my husband works in. Besides the usual hosting, we took him out twice for a meal, took him to a car racing activity which I assume he enjoyed as he loves cars. His parents picked him up today and they were extremely grateful (provided gifts which we refused but they insisted) and said several times how much they appreciated the opportunity for him. He only said thank you once because his parents instructed him on the way out. I have two younger children who I feel are more polite, in fact the past year I have had two strangers at different times tell me how polite my children have been, once on holiday abroad as they asked for table and once at a restaurant when they went to the counter to order their food, strangers near them then came to tell us how amazed they were at their politeness and manners. Am I wrong in thinking he should be saying thank you independently at this age?