Spalding

Wikipedia - "A Spalding Hi-Bounce Ball, often called a Spaldeen (with the accent on the second syllable), is a small pink rubber ball, somewhat similar to a racquetball, supposedly made from the defective core of a tennis ball without the felt. It was the more expensive and more popular version of the Pensie Pinkie (made by the Penn tennis ball company). These balls are commonly used in street games developed in the mid-20th century, such as Chinese handball (a variation on American handball), stoop ball, hit-the-penny (involving trying to make a penny flip on a sidewalk), butts up, box ball, punchball, half-rubber, and stickball (a variation of baseball)."
Wikipedia
Streetplay
NYT: The Spaldeen Is Back (Even if the Dodgers Aren't)