– take a photo of your little brother or niece for exemple.
– print the photo on transparent paper (buy it at the stationnary shop).
– buy a bottle of clear, transparent hand soap.
– open the bottle by unscrewing the top part (the pump).
– cut the photo and roll it up so you can fit it through the bottle opening. Put it upside-down, it will be funnier!
– put the pump back in and voilà!