dear colleague,
Where do you live? nearly every therapy can be called stimulating.
I have been around a long time but have never heard of "infant stimulation therapy" as a therapy sec.
I would suggest you tell us more, where did you hear,read about it? in which context. This question is hard to answer now. Especially now we are slowly changing the way we look at treatment worldwide. We no longer "give a specific treatment"eg Bobath, Vojta, sensomotor training, stretching, but look at the disorder and the question the parent or child has. That becomes our treatment goal.
good luck
esther