Step 7 – Once your rocks are dry, use your chalk to draw a tic-tac-toe board on the ground. If you have a fun little bag or even a shoebox, you can store them in a safe place for your next game ...

With the weather getting nicer, kids will want to get outside! Maureen Kyle shows us how to create tic-tac toe rocks to play inside or out and use their creativity.

"Using this mechanism, we created the world's smallest game board for playing tic-tac-toe, where every move involves molecular self-reconfiguration for swapping in and out hundreds of DNA strands ...