Geospace Jumparoo BOING! JR. Pogo Stick by Air Kicks, Small for Kids 50 to 90 Lbs, Green This addition to the Jumparoo BOING! family of Pogos designed for younger kids & beginners. BOING! JR.'s rugged metal spring is completely encased within a steel housing for safety. Comfortable foam grips on the T-handle for hours of Jumparoo Boing-ing! Suitable for kids aged 4 years & up, weighing between 40 lbs. and 80 lbs. Non-slip footpads and rugged rubber pogo "foot" for superior safety.