I will share my answer that i gave in another forum i was active (i dealt the same question and hope you will benefit)
What created God? God is free from time and space so this is out of scientific debate. Just as Neo Darwinist respectfully step aside from answering chemical evolution this question is something i leave to ''faith''. After all the first pillar of Islam has a purpose doesn't it (relate this as Faith into your religion of Christianity when explaining to someone)? Something caused something to happen even the big bang has to have a cause and then that cause has to have a another cause and we can take turns and turns on this type of discussions. My intelligence cannot define God. If an engineer leaves his structure to prove his existence, the structure alone is all what we got to understand the engineer. The engineer and the material the engineer is made out of will not be answered through materials of the structure alone but indeed the structure bare witness to the engineer and this is why ''faith'' is the first and most important pillar. But just because we cannot define God through his creations we cannot conclude that God does not exist. So lets move to the next stage (concluding from what we can measure).
Main argument that non-believers bring is that there is no evidence to prove that God exist
When you look at a painting, definitely you think of a painter. Should I explain the paintings behind our DNA and sequence hypothesis, the brain Cells and its central nerve system, distance from sun, the amount of gravity, earth’s rotation speed.
If you walked into Dubai or even looked at a simple water bottle it’s impossible to think there is no intelligence behind it.
Who has created what we have not created? Such as the human eye which is among the most complex organs in the body, it perceives 7-10 million colors through a synaptic flash (one tenth of a second) and also many other remarkably wonderful creations. As you know the least complex cell would consist of 100s of specific protein and amino acids placed in right order for DNA and RNA to transfer, transcript and pass the information.
You can look at a paper flower and imagine this was created, but is it a crime to look at a real flower and think this was created? Also if you look deep into the flower and its micro structure it has 1000s of patterns and transfer of information which is the reason the flower and its plant has survived and reproduced for a long time. It’s both beautiful and smart at the same time.
A complex design points to a deliberate designer, I believe there has been fine tuning in order for these to exist.
If the earth rotated a bit faster or slower the result would be too cold, too hot or too much of storms. Size of earth and its corresponding gravity holds a thin layer of gases, if Earth was smaller the atmosphere would be impossible and if Earth was larger it would contain free hydrogen making life quite impossible. The planets around our earth which we have clearly observed has proven that different sizes, different distances from the sun etc cannot produce the same outcome or complex life (or any life at all) with millions of micro to macro creatures even though we know that it all came from the same elementary particles. Even at a speed of 67000 mph it manages to keep its position at the exact distance. There can be similar observations such as earth in other such massive bodies and the question is who designed the entire planetary systems.
Well it just happened by chance? That alone does not sound like science. Don’t you see good design around? There is nothing wrong to question a designer. Order in the universe implies an organizer. It is governed by rational laws. Think of the concept of symbiotic factory which is an ecological and economically brilliant concept. Certain symbiotic factories do exist in our universe and the first that you can look into would the cycle of Respiration and Photosynthesis. Every moment we breathe in O2 and give out CO2 which is taken in by plants which continues to give out O2. Such a symbiotic factory only leads into intelligence or fine tuning. Waste product of one factory completely acts as a raw material for the other.
How this order came? Uniform laws of nature connotes an intelligent law maker. Much of life may seem uncertain but look at things we can count. Gravity remains constant, hot cup of tea will get cold and earth rotates the same in 24 hours. Such are the identified laws of nature that are constant. Can reliability or Order exist without a fine tuning?
Richard Feynman (Nobel Prize, Quantum electrodynamics) said ‘’Why nature is mathematical is a mystery. The fact that there are rules at all is a kind of miracle’’
You are free to think of a law without lawmaker, but it’s completely rational to think of a law with a lawmaker.
Designer >> Organizer >> Law-Maker = Creator
Well the nature is working automatically, but that does not imply denying the need of a creator. God is not a sentimental unscientific argument. The term automatically does not mean absence of a controller at all but rather absence of knowledge of the controller. If you see a robot that works automatically what it means is the machine does not require continuous interaction from the operator but still there is an operator who activates the machine and monitors it’s working. So the machine is the entire universe or everything that our limited knowledge can understand but can we use the machine to define its creator? Time, Space etc are things ''we'' use to identify patterns in this remote machine God created but God alone is free from Time and Space so there is no way of understanding the nature of God through his creation. We only have the iphone to guess how Steve Jobs looked like in this situation

, can the metal, glass, circuits in a iphone give us an idea about the flesh, blood and DNA of Steve Jobs? no. So we cannot use the universe to get an idea to understand what God is made out of.
Simple answer you can give to her is, kiddo God is free from time and space
Expert, Remote yet invisible programming of God has been evident. Francis Collins, Lord Kelvin etc. are examples of people who were forced by science to believe in God
Max Planck said ‘’For religion God is at the beginning, For Science God is at the end’’