This is a fun easy optical illusion that is very easy to do and very cool.
Step 1: Trace Your Hand
This is pretty obvious, but trace the outline of your hand with a pencil.
Step 2: Start Drawing Lines
Take a sharpie or any black marker, and draw a line to the hand. Then draw a arc starting at one side of the hand to the other like in the picture. Make sure the right side is a little lower than the left side or vise versa.
Step 3: Draw Lines Covering the Entire Hand
Continue doing drawing lines till the entire hand is covered.
Step 4: Color
Color in the between the lines with alternating colors. Highlighters are best for this. Enjoy!