We can’t hide the fact that these days a lot of kids don’t play or get dirty outside of their homes already because some parents tend to just let their kids play using the computer or iPad to keep them busy.
Let them explore outside and play with other kids. In that way, they can also socialize and learn more new things aside from what they can learn in the computers. If there’s a nearby park with children's playground equipment, take your kids there and who knows they can meet new kids and become friends. Don’t let them just play inside the house, they need to go out!