Our Blue Gender Reveal Baseballs come with one baseball filled with vibrant non-toxic blue colored powder. When the ball is hit for a home run or the pitcher throws a fastball against a wall, it creates a cloud of blue powder smoke. These balls have been hit by children as young as 3. They will bounce and not bust if missed on grass, but they will break when missed over concrete. We suggest to use a metal or wooden bat for your surprise home run. We can ship orders out the same day if placed before 3pm CST. Share your photos and videos with us, on our social media pages.