Your baby is at the latest stage of weaning. You should be feeding him 3 meals a day and a snack, all centered on good nutrition. Think of the snack as a supplement, and use it as an opportunity to make up for nutrients he doesn't get in his meals
At this stage, he will be about 1.5 times taller than he was when he was born, and about 3 times heavier. Some children can even stand comfortably by themselves, while some are even taking their first steps. But these children are in the minority. Most children will not begin walking for up to about another six months. So do not rush and keep calm.
It is at this time you should get your baby in the habit of brushing his teeth. It is also a good idea to introduce basic aspects of the daily rhythm of life, such as washing his hands before and after meals and after going outside, as well as expressions such as "please" and "thank you."