A friend of ours did a popcorn count-she got several different types of microwaveable popcorn, and popped it all. Then she counted the unpopped kernels as well as the popped kernels in each bag and noted the different. Another friend did a shampoo one. They used several different types of shampoo and bought some fake hair at the store, and used the shampoo to see which lock came out the softest.