Heres a fab document a lady at uni forwarded to me, she used it to support her EYPS baby placement, I will certainly be passing it onto my parents and staff
Here's a link to a
article about sensory play short article you can always refer to, there are numerous similar ones if you just google 'sensory play'
there are a few books on amazon about sensory play, pretty sure if you have any books/articles on babies and under threes it will discuss the benefits of exploring bodies and play through the senses-Elinor Goldschmied discusses heuristic play if that is close enough link?
Birth to Three Matters will have lots on sensory play- the B-3M Review by David et al. also discusses it
...haven't seen anything specifically about the use of food, it is controversial with some but taste is a sense so we need food to experiment with... on Embarassing Bodies the psychologist used food play- using the senses to explore the food- with a little boy who didn't eat very well in order to work through his issue with food
can't think of anything else for now , hope that helps though!