Next-gen wheelchairs are modular and shapeshifting

Wheelchairs provide valuable independence to their owners. Designs vary according to the terrain and user needs. Both of these can change over time. However, their price makes it difficult to afford more than one chair.  In response, designers are taking cues from bikes and robotics to make wheelchairs that adapt to the varied user needs. The UNAwheel Maxi device is a wheelchair add-on. It hooks onto the front of an existing chair and is compatible with basic and active wheelchairs without