Meanwhile, Doc fixes up his porch chair and Sprocket wants to sleep in it.
The Grapes of Generosity are magical artifacts which appear when a Fraggle needs to learn how to be generous. They're so delicious that a Fraggle will want to eat them all himself, but if he doesn't share them, he eventually becomes weightless so that everyone can see how selfish he is. Being generous again returns him to normal.
On The Hub airings, during Uncle Traveling Matt's shopping trip, all the products behind him are blurred out, most likely to avoid paying for trademark use, at one point tracing around Matt to blur everything but him.