I have bumped it up a few notches since then, oh yes I have. Check out this incredibly clever design. A box in a box to catch the mess.
Then the inevitable discovery was made that it is more fun to put it outside the box than actually play with it in.
Because it was edible of course! I wasn't fast enough to get a picture, but at one point they both had their backs to me eating oatmeal very quickly. Dry oatmeal, yum... (yes, this is why I only use edible things for the sensory table.)