A 9-year-old is strictly prohibited from the gambling floor of any casino in 2026. In major hubs like Las Vegas, Atlantic City, or Singapore, the legal age to enter a "gaming area" is 21 (or 18 in some international jurisdictions). Security is very tight, and if a child is caught standing near a slot machine or table, the parents may be asked to leave. However, most "Resort Casinos" in 2026 are designed for families; children are allowed to walk through designated walkways to reach restaurants, theaters, or the hotel elevators. Many 2026 resorts also offer "Arcade" zones or supervised "Kids Clubs" located far away from the casino floor, allowing parents to visit the casino while the 9-year-old enjoys age-appropriate entertainment elsewhere on the property.