It was great for concentration building, which is definitly a skill children will need for kindergarden, but done in a developmentally appropriate way.
Later the children found some egg cartons that they used for ice cube trays:
Some of their thoughts:
K: It's cold!
E: Look, snippers!
A: There's ice in these!
E: There are two ice bowls.
A: I like ice cold water.
Ms. Erin: Where do you see ice cubes?
K: In snow
M: At the store. We went to the farm and opened the fridge and we saw a big huge ice cube!
Note to self, tomorrow ask the children what ice is for...