Tactile balloons for sensory exploration
11 Fun Farm Small Worlds - A great resource for activities grouped into theme and concept.
Small World Play - Farm (actually really like this idea. 4 little trays w/ different ingredients mimicking fields +, with animals. Supervise while using.)
My Garden ~ Bird Seed Sensory Bin by FSPDT Hands on play for multi aged kids.
Beach Sensory Play and Small World, great for getting descriptive words for literacy.
Fireman Sensory Bin
Firefighter Sensory Play-- You can use whatever theme you want. I used bugs at my house.
Construction Site Sensory Play - Craftulate
Sensory bin with black beans, bugs, sticks, logs, flowers, and stones. Add scoops and small pails for pouring.