Here is a great activity for building concentration and those helpful fine motor skills. You simply get two attractive cups or small bowls (porcelain or metals are best because children are attracted to the sounds it makes when the beans fall into them). Then you place whatever you like in one, it can be dried beans, rice, beads, get creative. Obviously these are "choking hazards" so you always want to be around when you are showing the child how to use them, also some kids are fascinated with sticking things up their nose and in their ears, so teaching them the proper use is very important! If you find that they are throwing the materials constantly...and after many times of saying "these are for transferring...we keep them on the tray....." then you might want to take the tray away for a few weeks and present again later.
The idea of this activity to have to have the child transfer the materials from one cup to another by hand. They feel the texture, they hear the sounds as it drops in. Any items that spill they leave for last and pick up one at a time with their pincer grasp (finger and thumb).