There is an interesting communication team building activity where everybody is given a number and they have to line up in the correct order without speaking. but there’s one catch, everybody is also blindfolded.
You might also want to hide an object in a toy box and blindfold someone and have them feel for the object. Describe the object they must find without naming it or use the most common words. For example, if your using a stuffed rabbit do not use these words: