How would I say every child wants a pochibukuro
 

子どものみんあわぽちぶくろがほしがっています。

Does that sound right?:ywave:

Not sure if 毎 can be used for people, but personally I would go more with
すべての子ども. I guess you learnt using romaji coz you used わ for the topic. Even tho in romaji it is written "wa" it uses the hiragana は (only case that I know of where は is read wa).
Another thing, I do this mistake alot too. Watch carefully when you type with IME the outcome. Some letters need to be pressed twice and some requires a ' to avoid melting together letters. When you typed みんな you pressed only once the N so you got みんあ.
So the way I would write it is:
すべての子どもたちはぽちぶくろがほしがっています。

Forgive my ignorance, but what is a ぽちぶくろ?

EDIT: Forgot to tell you that I am a student so errors hide everywhere in my Japanese phrases :)

Never mind, ignore my question. Yahoo 辞書 answered my question :)

Not quite. What is みんあ?

こどもはみんなポチぶくろをほしがっています。