For a child of 2 years, games such as Building Blocks are good to develop and encourage motor skills and hand-eye coordination. The activity of putting together blocks of various sizes and shapes stimulate their interest and concentration power.
Talking toys that repeat words or phrases are also good idea since this is the phase when the child is learning to talk, such toys are useful to teach new words and are ideal for repetitive talks with the child.
Some games that contains blocks of different shapes are good to encourage and enhance fine motor skills.
If he is not habitual to putting things in his mouth, then you can give him some clay or special play dough to play with. You can teach him to look at various objects around the house and try to shape the dough into those objects or may be use his own imagination to create different shapes with the dough. Actions such as kneading the play or dough and shaping them into different forms will give a good exercise to his various muscles and increase fine motor skills and at the same time boost his active imagination and creativity.
While the special play dough is claimed to be child friendly and safe, if you are still apprehensive about it, you can give him the dough that you knead for making chapatis. Knead this dough slightly harder than usual and give him to play. Even if he accidentally outs it in mouth, there is no cause to worry.
Another fun activity would be to give him various utensils such as glasses in different sizes, small bowls etc, and hand him a small pail of water. Encourage him to pour water into various vessels and observe the shape that water takes. Givem him a spoon and encourage him to explore the different sounds it makes when struck on different shaped vessels. Vessels with water will produce beautiful tinkling sounds that will delight him. Encourage him to figure out which vessels fit into another, invert them over and show him how to place them over the other building stacks of the bowls or glasses. Only care you should take here is to give him vessels that are unbreakable and without any sharp edges or points. Stainless steels ones are the best ones to play with.