I am always looking for "quiet toys" for the table. Miss.-2yr-old asks for them multiple times a day. I try to change them up and rotate them all of the time to keep her entertained. www.adelightfulblog.blogspot.com shared a color mixing activity that included an ice cube tray, colored water and a eye dropper. I didn't have any eye droppers, but I just ran out of baby Tylenol and was able to clean and use the dropper from the bottle.
The beauty is that I just had to set up a couple cubes and Miss.-2yr-old took it from there with no help.