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 :).
Popped Bubble Art: I've done this activity with my kids a few times now and it never fails to fascinate them - and me! Simply color bubble mix with food coloring and blow bubbles onto paper - as the bubbles land and pop, they create beautiful works of art. It goes without saying that this project is best done outdoors. A great one for those lazy summer afternoons.