Producing objects don't need a lot of justification. The simple fact that you can make something appear from thin air already is a great deal. Think about it. From nothing you make something by sheer will and it will be whatever you want it to be. These are enormous implications. God is supposed to have that sort of power. But of course any production can benefit from some sort of justification or logical or emotional reasoning.
Here is a bad example: Silk and Ball routines. They are pretty, yes but what is the relationship between silk and ball? Do they come together naturally? No! Yet all the production strike us as beautiful when done right. The intrinsic aesthetics are enough to make us not question the purpose of the choice of props. Is there a way to add to the routine by giving it a better justification aside from the "pretty"-aspect? Yes! Here is how:
Of course a fitting music should go along that. Something nostalgic. Something that reminds us of childhood.
Then you grab a piece of silk and from it you produce a baby's rattle. Then a toy block, a mechanical tin toy, a toy car, a marble, a yo-yo, a Game Boy, a pager, a cell phone.
In between you show the silk to be empty. All the standard ball to silk moves come to mind when thinking about methods to accomplish this.
The aim is, that people will recognize those props. Either referring to their own childhood or the childhood of their own children. Along with the music it will lead to an emotional reaction, hopefully. And you end in the "here" and "now". Returning from memory lane.
This is an example of an emotional reasoning that make up the choice of props to be produced. You still have the God like power of creating stuff, but less random and with much more focus on a given subject.
Here is a cool little bit of wisdom. If people can choose what you produce the production will be stronger. Here is an example: Three imaginary coins are floating in the air. A 2 Euro coin, a 1 Euro coin and a 50 cents coin. The magician claims to hold a real coin in his closed fist. The spectator is asked to pick one of the imaginary coins. Then the hand is opened and the named coin is the only one in there. In terms of method: (C/S two times out of three or Shuttle pass, one time out of three.) Technically it's just a 1/3 chance that you are correct. But the fact that your audience could choose elevates it to a much more appreciative realm.
Let's give you an example for a logical production. This was created from the basic "bottle from a bunch of silks"-effect. It is designed to fit in a kids show.
Effect: Explain that you can Different pieces of clothing are shown. Warm socks, a scarf, gloves, a stupid hat. The kids realize, that all of that is needed in the winter. And from this whole bunch of clothing a thermos bottle is produced. The hot chocolate for later.
Method: A chair is standing around. Behind the backrest on a hook a sock is hanging. Inside the sock the thermos bottle. The clothing is shown and put on the backrest to show the next one. Near the end everything is picked up the loaded sock goes along for the ride. The bundle can be seen from all sides. Push down on the sock and the rest of the clothing and the thermos bottle will seemingly pop up.
You introduced the theme of winter. Coming up with stuff that keeps you warm. What could warm you more than hot chocolate? Right! Nothing.
A what the hell, one more: You may be familiar with the effect, that a rope is shown and a knot is tied. Then as the knot is tightened a colorful piece of silk appears in the knot. (Flash Silk on Rope by Doug Edwards Vol. 15 Issue 12 of the Apocalypse, read it, it's cool!)
Problem: There is absolutely no reason for the silk to appear aside from the surprise.
Solution: I put it at the beginning of my knot routine, by explaining that there are three basic simple knots. The first one; The real knot. I do a real knot to demonstrate. I open the knot again. The second one; The knot that is not. I do a false knot. And third; The magic knot. I do the knot and the piece of silk appears in the knot.
It is not the best solution, but it gives it a bit more reason and time... Yes time to see, that the rope is indeed normal.
And as an afterthought I might add a fourth knot. The knot that comes off. To do that, the piece of silk is twirled together like a rope and a false knot made. In your palm should be a removable knot, or it might by tied to the silk to begin with. That way you can pretend to take off the knot which would come as a real surprise and would justify the piece of silk in a strange way. And if you would open the piece of silk and it would have a hole in the center, it would even further explain why a cloth was used and not a rope. Aside from being funny.