Farmyard Sensory Bin--cute. This looks like it's all DIY except the plastic animals. I was just saying today that I felt this bizarre mama guilt for not owning a farm-related toy. Maybe we will do this since I have no intention of buying one :).
All you need is baking soda, black food coloring (found in baking aisle), and a bit of water. It feels almost exactly like real dirt! Slowly add water until the baking soda is slightly moist You want it to be damp and moldable but not wet.