どれにしようかな、天の神様の言うとおりって英語でなんて言うの？

This is a children's rhyme used for finding something randomly, no matter how many people or choices are available. When you get to 'More' that is your selection.

Eenie, meenie, miney, moe - This is used to pick something at random. It is also used as a nursery rhyme. Students sit on the ground in a circle and one leader who is called "it" walks around the circle and chooses the person he wants to compete against for a spot in the circle. The nursery rhyme has several variations, and you can even make up your own if you wanted to.

The one I grew up hearing;

Eenie, meenie, miney, moe,
Catch a sailor by his toe.
If he hollers, let him go.
Eenie, meenie, miney, moe.
pause
My mama said to not pick you.
My mama said to pick you.
the game of chase begins

"Ip dip doo..." is a rhyme said by children in the playground. Sometimes adults use it too, but not very seriously.

Rolling a dice and tossing a coin are options for choosing something at random. Rolling a dice gives you six options, while tossing a coin only gives two.

Ip, Dip, Dip
My Blue Ship
Sailing on the water
like a cup and saucer
O U T spells OUT.

or

Ip, Dip, Do
The cat's got the flu
the dog's got chicken pox
and so do YOU

Alternatively, you can toss and coin for heads or tails
Jane :)

"Eenie, Meenie, Miney, moe" and "One potato, two potatoes, three potatoes, four. Five potatoes, six potatoes, seven potatoes more" are rhymes that children often sing to choose between things.

"Flip a coin" When adults are faced with two choices but don't know which to choose they often flip a coin and allocate each choice to a side of the coin.

eenie meanie minie mo....
This is one we used lots when we were kids...not so much!

rock paper scissors.... - classic game to decide who wins something! You choose to be rock, paper or scissors and there are some rules to playing....

Rock beats: scissors but is beaten by paper
Paper: beats rock but is beaten by scissors
Scissors: beats paper but is beaten by rock.

heads or tails
Flipping a coin (in the UK one side of the coin is the queens head and the other side is called 'tails')

Hope this helps! ^ ^

To decide something at random, you could use a rhyme known as "Eenie meenie miney moe..."
You could also flip a coin, at the point which you would ask your friend: "heads or tails?"

When you want to use a phrase that expresses that you are deciding something at random; then you say it in the following ways:
-Let's flip a coin
-Let's roll a dice