Tadoku mainly means to read a lot, but it is not only for reading printed books, you can get input of your target languages by listening, watching or playing games,and luckily there are many sites for doing them on the net.
Of course, again here, English is the easiest to find fun materials. Try to google with such words “story onlines”, and you will get lots of fun sites.
☆FREE ONLINE CHILDREN’S STORIES http://storytimeforme.com/
☆Just Clean Jokes http://www.justcleanjokes.com/jokes/
☆Interactive Stories for Kids http://www.woodlands-junior.kent.sch.uk/interactive/onlinestory.htm#talk
Some sites offer more options, like French, Spanish etc.
★Professor Garfield Toon Book Reader http://www.professorgarfield.org/toon_book_reader/index.html
★International Children’s Digital Library http://en.childrenslibrary.org/
For French Tadoku
♥ TV5Monde Japon http://www.tv5.org/cms/japon/p-328-lg7–.htm
♥ Digital Dialects http://www.digitaldialects.com/Furansugo.htm
♥ BBC Languages French http://www.bbc.co.uk/languages/french/
And, of course, you can’t miss this: POCOYO ♥