1 clear plate (I reccomend ceramic)
1 dry erase marker
1 cup of water
Draw shapes or letters on your plate and fill them in completely (try testing different shapes and colours)
Slowly pour water over the shapes
Enjoy!
The ink in dry erase markers is insoluble in water, this means it does not dissolve or disappear in water. The ink is also less dense, or lighter than water, so it becomes bouyant and floats on the water.
Recipe borrowed from https://happyhooligans.ca/dry-erase-and-water-floating-ink/