A modular system fluidity-based controlled expansion system that uses a gas to inflate an inner container quickly which then causes a fluid filled container to displace fluid causing expansion and deformation of the second container. A cable over the second container fixed at one end simulates tendon action. Each module is a system to itself requiring five volt logic and 16 volt 0.250A pulsed for energy input. The length of the power pulse determines the strength of movement. Single action units and double action units are available system can be scaled. Login input is a serial interface to tell the unit when to execute the command, allowing synchronization of movement.