Kids love this novel and fun activity.
Two people – one on each end – hold the handles then pull arms apart to send the ball flying to the other end and then keep your hands together while your partner sends it back.
In order to be successful children need to develop timing, sequencing and motor plan their movements so provides great opportunity for sensory motor skill development, in particular bilateral coordination and motor planning, all within a fun activity. The position of the arms away from the body also helps develop shoulder stability. Try adding variety by having kids play in high kneeling or while laying on their stomachs to work on their core muscles. You could either work with an adult and a child to work more on the above listed skills, or try with two children to support the development of social engagement as the children need to watch each other and respond their movements with smooth timing to keep the momentum going.
WARNING: Choking hazard due to small parts. Manufacturer recommends unsuitable for children under 4 years.