Ideal for beginning players 8 and under playing on a 36' tennis court, this lightweight foam ball has an oversized diameter for simple learning. The QST 36 kids' foam tennis ball features a higher density for controlled bounce and reduced speed. With a red and yellow 2-tone design that allows young players to easily track spin while mastering their hand eye coordination. An ideal first tennis ball, the QST foam has an oversized diameter for simplified training and practice. Package of 12 balls.