The Center for Religious Services in the Diaspora
Education kits for download:

Tu Bishvat kit Tu Bishvat kit
Tu Bishvat kit which include- Peulot, presentations, videos, Dvar Tora, etc., in Hebrew and English

Recommended Links

aish-Sukkot
aish-Sukkot
many types of activities for Sukkot like colouring, building a Sukkah etc;
Shiron net
Shiron net
words/lyrics for most of Israeli songs
Tnuva- Shavuot
Tnuva- Shavuot
Shavout Recipes
Chagiga of Chagim
Chagiga of Chagim
ideas and programs for chagim