The two most difficult things (excluding specialist non-fiction) to get published are:
(i) short stories ; and
(ii) books for children.
So you're not not going to find it easy. You need to do two things (in the first instance) to give yourself any chance of getting your work into print. Firstly, get hold of a copy of the Children's Writers' and Artists' Yearbook. It's packed with information and advice which will help you:
http://www.amazon.co.uk/Childrens-Writers-Arti sts-Yearbook-2009/dp/140810377X/ref=sr_1_2?ie= UTF8&s=books&qid=1232751719&sr=1-2
As the Yearbook will show, you can either submit your work directly to publishers or send it to potential agents. Actually the word 'either', in that sentence is incorrect. There's nothing to prevent you from following paths. (That's exactly what J K Rowling did when trying to get her first book published).
The Yearbook will help you to decide which publishers and agents might be interested in your book. (There's no point in sending a story for 7-year-olds to a publisher who only publishes non-fiction for teenagers). However, my second piece of advice is possibly just as important: Spend a great deal of time in bookshops, trying to identify which publishers are likely to be interested in what you've got to offer. (Again, there's no point in contacting firms who only publish well-established
series, rather than single works).
Do plenty of 'homework' first. Then you won't waste time contacting agents who don't accept new authors or publishers who only want complete series of books.
Chris
PS: Also, don't get hooked on answering questions on sites like this or, like me right now, you'll end up spending time on here when you shoul