... to arm, waist, hip, back, shoulder and leg. The overseas authoritative medical institutes verify that jumping and running can ... can improve metabolism of children, accerlerate blood circulation, stimulate the secretion of growth hormone , and give benign stimulation to ... receipt of payment7MOQ 100 Pairs820'FCL800 Pairs940'FCL1200Pairs1040'HQ1500 Pairs The best outdoor toy for kids : Up Wing Jumping ...