This randomised clinical trial investigates the effects of powerball using static and dynamic surface on upper limb Endurance and coordination in children with Down Syndrome. The study involves 28 children with Down Syndrome aged 6-10 years, will be randomly assigned one of the two groups for 3 week intervention period. Power ball training 3 sessions per week with the duration of 30 mins each session. Group A will receive different upper extremity activities with power ball on static surface while Group B will receive same activities with power ball on dynamic surface using a BOSU ball. The whole session followed by warm up and cool down sessions for 5 minutes each. Endurance will be assessed through ABIL-HAND kids tool. To access the coordination BOT-2 subsets test will be used. Data will be assessed using SPSS 27.0.