Sustainable Soccer Ball For Kids Eco Sports line of Eco-Friendly soccer balls continues with the size 3 soccer ball targeted for players under the age of 8. This ball is perfect for players who are just starting out, as it’s size combined with the vegan material on the outer layer make this ball one of the best on the market to dribble, shoot and pass. This non-toxic soccer ball is made entirely out of sustainable products making it the first of it’s kind to arrive on the market. Best Size 3 Soccer Ball For Youth Girls & Boys With the Size 3 being the most used ball at the youngest levels of soccer, it is essential to get a high quality, long lasting ball, and there is no other place to do so than Eco Sports.