Mystery jar #1

Because the children are getting better at putting on their "scientist hat" I brought in something to test their skills.  

I told them nothing, other than it was safe and from my house.  

They used their 4 senses to come to any conclusion that they could.  Here is what they were saying:

Sight:  marshmallows, snow, flour, ashes, sand, powder
Smell:  ice cream, nothing, yucky, flour, peanut butter
Touch:  snow, powder, sand, powder with water, cold, smooth, little bumps
Hear:  wind, air, the echo of the bowl, nothing

Do you have any ideas based on the children's descriptions?