Sight

I have to agree with Jagged on the repetition and being more descriptive. It's very hard to get repetition to work right, and with a relatively short poem like this it isn't really needed. Aside from the actual lines themselves, you also seemed to repeat certain words. It made the poem a little choppy and... dull I suppose. I would suggest just looking up some synonyms.

I would definitely add more descriptions. You had a lot of obvious statements, as Jagged pointed out. Also, try to avoid using words like "things" in your writing. "Things" is very vague and uncreative. You don't have to say every single thing you see, just a few.

Also, your rhyme scheme was a little off. Sometimes your lines rhymed, sometimes they didn't. It made your poem a little difficult to read.

This isn't a bad start for a poem, just change around a few little things and it can be even better.

This needs more details: expand on what you see. 'Many things' is grandiosely imprecise and vague; same goes for 'some are big, some are small': no really? I never would have guessed. If you're playing with senses, and here I'm assuming sight, then expand more on what you see: describe animals, describe the landscape, the flowers, the trees, the random clouds in the sky... As it is right now, this poem is, essentially, a few words turning in circles.
Also, the repetitions are mostly unnecessary, in that they don't bring any significant impact of the meaning or give any important emphasis. Reconsider their use.