Orange seed

As children, our imagination is always running wild. This with a bit of naivety, makes a perfect setting for parents to trick us into believing stories such as the Orange seed one. 

"When you swallow an orange seed, the plant will start growing from your tummy. And whenever we need a fruit, we'll simply pluck it out of your mouth!" 

The same was true for watermelon seeds as well.

I think grown ups have a fair share of fun trolling kids!