Help me make a mobile

I've been given something wonderful, and I'm not sure where to start. My sisters were visiting recently, and one of them makes ceramics - mostly turned pots, but she brought an extra gift for me this time. She made various shapes that were designed to hang as a mobile - like people hang over babies cradles. The ones I have are dragonflies and fishes, and I'm thinking of making something to hang in my polytunnel. I have a bit of a pond in there, well actually it's a builders crate, but I'm hoping to make it look a bit more natural and plant it up eventually, currently it is my dipping pond for watering.
I'm thinking of having the dragonflies in a tier above the fishes. The dragonflies look like they will hang flat, (so seen best from underneath) whereas the fishes will be viewed best from the side.
As well as the ceramic pieces I also can cut plenty of sticks of various shapes and sizes. I was thinking of using fishing line to hang them, since that will be virtually invisible, although I may have some alternative thread stashed away somewhere.
How do I come up with a design that will work? I'm worried that it will end up lopsided, and with so many parts it is difficult to manage. Any suggestions on how to control it all, given that I can't balance it without hanging it, and I think it will end up quite big (and heavy)!

They are so beautiful.

What do they sound like when clinking together?   They remind me of wind chimes.

Mobiles that hang from a circle with different length of string are popular.   My friend made one from an embroidery hoop, then wrapped the hoop with colourful paper to hide what it was.

I like the ones at the doctor office.  They have streight pieces, then suspended, another straight...it's hard to explain in words, and the internet doesn't seem to have any photos.  Think like this, but with wire instead of paperclip
https://www.wikihow.com/Make-a-Mobile

They do sound melodic when clinking together, however I think that if made into chimes they may eventually get damaged, also I don't know how weatherproof they are going to be. I found some lovely designs that are really easy to do (I may start another thread on them!) however I decided to do a tiered balance design, as I love the extra movement you can get.

This is a fairly simple one (symmetrical) but they explain how to go about it here



So it's all about levers - getting the weight and the distance from the pivot (hanging string) right.



or so I thought!

If I were making a mobile with those, I would start with the big fish first.

Similar to the pine cone example, start with a cross of two equal sticks.  Suspend a big fish from the end of each and then see if the weight is balanced.

Then four fireflies (or what ever those are).  Check the balance and move accordingly.

Or if you want a more complex design add more sticks.  Just check the balance after each addition.

This sounds like a fun project.

I made a mobile out of cardboard for my son's crib.  It was clowns and I found the instruction in a magazine.

Well as suggested above I laid out the shapes in a kind of design. Here it is minus one of the lengths of stick:

laying out hanging mobile design

I then carefully tied lengths of fishing line to each shape. It is quite fiddly to tie fishingline - I hadn't realised! I did lots of half hitches in the hope that they won't just come undone again.

attaching the string to the fishes

Then starting at the bottom as Anne suggested I got that bit balanced, then attached the next layer, then the next. I used a hook on one of the crop bars to hang it from once the mobile started to grow. As it got heavier it became more difficult to bring it away from centre, but if the supporting strings are too close they tend to slip even closer....Eventually I succeeded in hanging the complete assembly above the pond.

first attempt at hanging mobile complete

I'm not completely happy with it. I feel it is too long, and that I should have fewer, denser tiers of fishes. I'd also like more assymetric rods to make the shapes spiral further away from central. I'd quite like the dragonflies at least to have something less bulky as the support rod than the sticks, but fence wire (which is easiest for me to get hold of) probably won't be strong enough for the weight of the hanging.