Among other things, Danny was stealing Keith's toothbrushes to sell. We see a blue toothbrush replaced in the holder, but when we next see Danny take it out, it was pink.
While Danny is selling Keith's items outside the school during the auction, he is surprised to see his family walk up and catch him. However, Danny didn't seem to notice the extremely noticeable and large Partridge Family bus with the family inside pull up to the curb right in front of him just before.