We hope you know the difference between your Chemicals and your Consumables, otherwise you need to be watched closely.
As far as the Notions go, most classification systems wind up with certain things of which there are not enough to make a separate group, or which defy classification. "Miscellaneous" doesn't seem to have a compelling ring to it. Who wants to read a catalog section called "miscellaneous"? Thus, our title. And besides, sometimes all you need is a great notion.