You can do this at home, too! Although I will say I collected 'garbage' in my cubicle for a few months to get it to fill an entire large cafeteria. You can do the same thing just on a smaller scale--maybe in your living room or basement!
1. Make a shopping list based on the item you have collected. I made them in Braille, large print and a picture list (below) for my non-reader students. You can also make a picture list for early childhood age students who are just learning how to recognize items. Make sure your pictures are clear, keep a cautious eye for background visual clutter.
2. Set up your grocery store. I set things up according to categories. I had a freezer section, dairy and aisles with similar items. I made sure that all the boxes & packages were in good condition. I taped down the flaps when needed. And I made rows & stacks just like in a regular grocery store.
3. I went to a local grocery store and asked for their signage so I could make sale labels throughout the store. I made sure they were in large print to make it easier for accessibility.
4. I also asked the local grocery store for old shopping baskets. As with everything in the grocery store, these are all real objects to teach about items.