Our most recent sensory bin we've been playing with is jungle animals! My son is starting to say the names of the animals, so I thought this would be a good reinforcement.
The materials I used include dry oatmeal for the base, a jungle animal play set ($3.00 at Walmart), and a cutout circle for a pond. I used scrapbook paper that looks like water.
He really enjoyed playing in it until the oatmeal started flying. Then it was time for clean-up!