The US Government has a consumer price index where they track the price of a market basket of goods. They send people to the grocery store and write down the price for each item. They also take care to adjust this carefully to account for changes in size, quality and more. I think it would be interesting for you to choose items you can get and do a similar thing. You can then update the list each month, and make comments about how it has changed. This is actually something very useful to economists, but the government of Venezuela has stopped publishing that information long ago. Here is a simple example.

http://www.thepeoplehistory.com/pricebasket.html

If you research consumer price index there is lots of information on how to do this. I do not think it needs to be as complicated as the US government. I think small and simple is good. To make this interesting, you can tell us how it changes from month to month, what it takes to get the items, how your choices differ, where you bought the items ect.

Adding a picture to the post (of the items at home) and commenting on how they changes, what the price was several years ago and more help us to better understand the changes as well.