At the World Cup level, these tiny changes in a ball’s aerodynamics can legitimately impact a team’s performance, so the intense scrutiny of the World Cup ball is perhaps to be expected. “You could argue that it’s the most important piece of equipment in the most popular sport in the world,” says John Eric Goff, Professor of Physics at University of Lynchburg.
A: Butyl bladders are an excellent choice for the interior of soccer balls because they create an airtight seal in the inner compartment. This helps greatly with air retention. Even better, you will not have to keep inflating soccer balls that contain a butyl bladder for the fact that they hold air much longer than soccer balls that don’t have a bladder made from butyl rubber.
If you are looking to teach your little one all about the game of soccer, than this Spalding Rookie Gear soccer ball is perfect. This particular soccer ball by Spalding weighs 25 percent less than most size three soccer balls to help your child build basic essential skills. Measuring 10 inches all around, this ball is specifically designed for young recreational players who age eight or under. This soccer ball has a composite machine stitched cover to ensure your kid will get years of play out of it. Your kid has the option to choose from five different color patterns, yellow and blue, yellow with blue and orange accents, purple and blue, green and blue, or pink. No matter what color your kid may want, this soccer ball is sure to stimulate their visual sensory to keep them focused on the game.
We all should keep in mind that the construction of a standard soccer ball is different than a street soccer ball. When you are playing on street or hard surface, you need a rough and tough ball. The shape needs to be spherical, and the cover/panels should be made out of rubber. They need to be scratch resistant as well. Not only that, if the panels are not hand-stitched with the high-quality seam there is a big chance they will not last long.
Due to the nature of these soccer balls, kids can surely enjoy playing with their peers as any ball in general, especially soccer balls encourage interactive play. With the soccer balls above, kids will be able to not only play soccer games on the field with their teammates but play at home and during recess, too. Social play is essential to the livelihood of kids in view of the fact that it teaches kids how to interact with society as they grow older. Social play even creates the opportunity for problem-solving skills, as well as imaginative and physical play.
2006 Teamgeist Adidas The Teamgeist is a 14-panel ball. Each match at the World Cup finals had its own individual ball, printed with the date of the match, the stadium and the team names. A special variant, the gold-coloured Teamgeist Berlin, was used in the final match. As in 2003, the ball used for the 2007 Women's World Cup was identical in performance to the ball used in the previous year's World Cup, but with a different visual design. 
On the other hand, replicas (sometimes called training balls or gliders) are designed to be just like the official match balls but are much cheaper. Their panels are often stitched rather than thermally-bonded and are made of a different material. However, they’re not necessarily less durable than official match balls. So, they’re the recommended option for most players. https://www.youtube.com/watch?v=j2Xn84L3Kcs