my son is 2yrs and 5months old, he is not gainning weight.. plz suggest me some food that can gain his wt.

A. to increase his weight, offer protein rich food as protien is building unit of our body. Like- all pulses, eggs, all milk and milk products, youghrt, beans, chickpeas, tofu, nuts, fruits like banana, chikoo, grapes, mango are also good