In the horoscope of your grandson we see that his lagna is Pisces and rashi is Scorpio. His moon is debilitated and conjoined with Rahu, which will make him distracted and defocused. Mars is debilitated in the 5th house which is not good. 5th lord Moon is debilitated. Also he is under the influence of Shani sade satti which is not good. Saturn Sade satti is the period of Saturn transit over natal moon. This period is not good for education and also health. he should be protected from cold, cough etc. You should do the below remedies.
1. Donate something from his hands every Saturdays.
2. Regularly remove his nazar.
3. Make him wear a Silver / steel Kara
Your boy has sickly constitution. He has no life danger. But he has trouble either speech or sight. Whether your boy has any problem with nervous or bone disorder? It is acute from 15-12-2016 to 28-06-2019.
First you clarify the problem, then think of his education.