When young children look at Allah's creations they have an in-built sense of wonder. It is this sense of wonder that needs to be nurtured and the Source of the wonder (Allah) needs to be explicitly taught.
My prekinders have been looking at Allah's creations and learning that Allah created everything. Ideally, it would be best to experience it, for example, go to the zoo to look at animals or the park to look at plants and mountains and so on. Then read as much as you can about it with the children and do an activity on it. Below are some of the things that we looked at.
Allah made us:
Allah made flowers:
And it is He Who produces gardens trellised and untrellised, and date-palms, and crops of different shape and taste (their fruits and their Seeds) and olives, and pomegranates, similar (in kind) and different (in taste). Eat of their fruit when they ripen, but pay the due thereof (its Zakat according to Allah's Orders 1/10th or 1/20th) on the day of its harvest, and waste not by extravagance . Verily, He likes not Al-Musrifun (those who waste by extravagance). ( سورة الأنعام , Al-Anaam, Chapter #6, Verse #141)
Allah made birds:
Do they not see the Birds held (flying) in the midst of the sky? None holds them but Allah [none gave them the ability to fly but Allah]. Verily, in this are clear Ayat (proofs and signs) for people who believe (in the Oneness of Allah). ( سورة النحل , An-Nahl, Chapter #16, Verse #79)
Allah made mountains:
And the earth We have spread out, and have placed therein firm Mountains, and caused to grow therein all kinds of things in due proportion. ( سورة الحجر , Al-Hijr, Chapter #15, Verse #19)
Allah made sheep:
Allah made camels:
Do they not look at the camels, how they are created? ( سورة الغاشية , Al-Ghashiya, Chapter #88, Verse #17)
Allah created all the animals:
Allah created fruits:
"Who has made the earth a resting place for you, and the sky as a canopy, and sent down water (Rain) from the sky and brought forth therewith fruits as a provision for you. Then do not set up rivals unto Allah (in worship) while you know (that He Alone has the right to be worshipped)." ( سورة البقرة , Al-Baqara, Chapter #2, Verse #22)