-Round fluted cake pan
The day before put water in the pan add the gems and the glitters. Put in the freezer over night.
The next day you will have a frozen crown. Ask your child to get all of the gems, he can use warm water and salt.
It’s a fun sensory play to learn about ice and what can melt ice.
My crown broke when I removed it from the pan, but he had fun anyway ☺️.