No, you cannot include your children in your Singapore Visit Visa application. Every traveller needs their own visa application, even babies and kids. You have to send in things like a copy of their passport, a photo, and their birth certificate for each person. If you're a parent or guardian, you also have to include a permission letter, the trip schedule, and proof that you can pay for the child's trip. If a kid is traveling with just one parent or someone else, you might need more permission papers. Singapore's rules make sure each child is checked individually, even if they're traveling with their family.