Why do some ice balls have more lines (spikes, streaks, bubbles) than others?
What if we put the balloon in hot water? in cold water?
What if we poured a lot of salt on the ice?
Would putting the ice balloon under running water melt it faster than putting it in a tub of water?
Why is it harder on the outside and softer on the inside?
What are the white wormy things?
Does food coloring stick better to salt or sugar?
Why does the salt act like acid on the ice?
Does it freeze better in some freezers than others?
What would happen if we made the ice balloon out of something else, like milk?
What would happen if we covered the whole ice balloon with salt?