Step Parenting Help

What are some good ways to instill gratefulness in my step son? His mother and her family are well off so he's somewhat used to a luxurious lifestyle. My fiance buys him toys every time he comes over and gotten him year passes to every amusement park around here; but we've decided that we were doing too much so we're going to let the passes expire and stop so much with the toys. What can we do to help him? I don't want him to grow up and feel entitled to whatever he wants cause no one likes that type of person😭