Is their any colourful and fun websites where they have Japanese learning pages to print out?

like to make learning much more fun. i asked in my last qustion for japanese posters, but this is a question about like many differennt types of japanese subjects. like worksheets to learn their alphabet, kanji/hirgana/katakana. maybe some wokrsheets to learn about the country, to learn about their social studies and other things that kids in japan would elarn all printable in the internet?