It took me about two days to prepare for this activity (simply waiting for the water to freeze) and doesn't cost a cent!
The moment I had an empty carton I knew it was time for this activity. I collected a small bowl of little bits and filled the carton with those and water and put it in the freezer. I decided to do it in layers, so all the objects don't sink to the bottom, but are spread throughout. I also picked different sized objects that either float or sink.
This is definitely an outside activity, so I got everything ready on the porch. Salt, old toothbrushes, a bowl for the found treasure and a bottle with warm water (not hot). I used an old baking pan, bad idea. Next time it will be a much deeper container since you add more water to the already melting ice.
I tore off the container and she went at it !! This activity kept her busy over an hour WITH my help, so it might entertain her for even longer if I leave her to it by herself.
Almost immediately the treasure started showing!
At some point I decided to add some blue coloured water just for fun!
A bowl of treasure!!!