I just googled roving needle felting and came up with a big list. Even on here! But there are lots of site and shops on etsy, etc. Here is a good tutorial for a ladybug. I used this for my first project. Have fun, it can be addicting!
Nova Naturals has a nice little kit that I bought for my 8 year old niece. She had no problem learning the technique. A needle holder seemed to reduce "finger poking" accidents. I bought some extra needles and they were higher quality than the ones I purchased at my local store.