Hydrogels are capable of absorbing up to 100x their volume in water. They are nearly transparent in water (if they are not dyed) as you can see in the animation below. By leveraging their absorptive properties we created dynamic systems with slow but meaningful and predictable actuation.
Early experiments involved creating perforated silicone blocks with hydrogels embedded in their core. Later on we developed processes for creating complex silicone parts with embedded tubes to allow for precise delivery of water to selective regions of our silicone surface.