Marbles

One of my newest sensory exploration mediums that I have discovered and is super fun is our bucket of marbles!  It's a beautiful mixture of clear orbs and multicolored flattened glass pebbles.  Everyone enjoys pouring and scooping with small, clear cups.  Adding in the test tube holder and cylinder block aperatures was a great provocation towards experimenting with volume.

GW held up his cup and said "Full of marbles!  Cup is full!"  as he adds more to the top and they run back onto the blanket and the bucket.
SC carefully adds marbles to the test tube holder, fascinated by how they go through the holes and hang out in the bottom shelf. 
Everyone is fascinated by the smooth, cold texture and are drawn into focused work.  Their work is intensified by their eyes working together with their hands, refining their hand/eye coordination
"More marble!" GH says as he pours his selected marbles back and forth between two cups, then pretends to take a sip.
T was especially interested in the half-wiffle ball with all of its holes that the marbles fit so perfectly.

We spent about 30 minutes with this activity and I had to drag us away from it to move on to our next meal.  We happily returned afterwards and more exploration with hand/eye coordination and exploration of volume continued.