This instructable will show you how to squeeze the last bits of color out of dried out markers, and make beautiful ice blocks in the process. This is a very kid friendly project that has many teachable moments which are highlighted by text in italics.
Step 1: STEP 1: Items
Nothing too sophisticated here:
Some "dried-up" markers. Darker colors work better. Washable markers are safer to use with the little ones.
An empty carton or other container (any shape will do).
A clear bowl or jug
2 liters of warm water
Step 2: STEP 2: Remove the Ink Foam
Break the end off the marker with a wrenching motion with the pliers. Pull out the foam and applicator and deposit them in a clear bowl filled with warm water. Many reactions (dissolution and diffusion in this case) are faster at higher temperatures. Just let them soak for 5 minutes. If you are lucky, the ink seeps out of the foam bits and creates cool patterns in the water. Squeeze the remaining ink out of the foam with your fingers or a spoon. You can cut the foam into shorter lengths to speed the diffusion of the ink into the water. Increase of surface area increases the speed of any reactions.