Why Our Car Was Full Coming Home

Here is a picture of all the stuff that our car brought home from Ryan's parents' house this last weekend...most of it was stuff that they wanted to clear out of their house or give to us and one was a birthday gift to Ryan (the shop vac). I think they were happy to see most of the stuff drive away in our car, but think they would've kept one if given the option. Can you figure out which one?