The ㄅㄆㄇㄈ Alphabet- Check out this website that lists several 注音符號(ㄅㄆㄇㄈ) websites/games. I recommend clicking on the link above and then scrolling down the page until you see this picture (the one shown to the right here). By clicking on the picture in the HanYu World blog, you can download this game. Inside the program, kids can choose which ㄅㄆㄇㄈ sound to investigate. They will be given a picture of an object that contains the sound and will see how the object looks like the ㄅㄆㄇㄈ letter. See below for an example.
If the website above is not working, please try this one.
Leveled Reading- This site hosts free, online, leveled reading programs that give children the opportunity to practice their 注音符號(ㄅㄆㄇㄈ). Check them out at: