"Once upon a time it was a very big snail.
One day he asked his mother:" Why am I so big?" His mother didn't know what to say and after a smile she said:" You're big for the others but you'll always be small for me!" Then she gave him the sweetest kiss and the snail climbed the wall on the way to his room!
AND....they lived happily ever after!!!"
That was a part of a tale I made up for my two years old niece when we saw a very big snail climbing a stoned wall...