The first set of images is the Aarhus gymnastics and motor skills hall in Denmark. Each picture I have chosen specifically for the content within it. You will notice that the equipment in this gym is very similar to what you would find in an Sensory Integrated Occupational Therapy gym, however the design of the gym itself is completely unique.
Rock walls are also found in SI OT gyms... why not express them so that they are integrated to the space, perhaps in this way they will not be seen as a specific obstacle but rather integrated into the structure of the surrounding environment.
Taka-Tuka Land shows that small crawl spaces for children can be creative and fun, children often seek tight spaces for comfort and retreat so why not make them inviting. The varying heights and depths of space can help with the proprioceptive and vestibular therapy.
I am aware that economics plays a large part in design and most often children's clinics operate on an extremely limited budget. However the role of a architectural designer is to work with a budget and still create stimulating spaces.