Quinoa, a grain-like crop grown in South America, is not one of the grains considered chametz (wheat, barley, rye, oats, spelt, or their derivatives). Some medieval Ashkenazi rabbis ruled that kitniyot (legumes) could not be eaten during Passover because they could be confused with chametz products. Some authorities consider quinoa to be kitniyot, while others do not.
The requirement that we rest on Shabbat is explained by the Torah according to two broad themes.
Tu BiShvat (Hebrew for the 15th day of the Hebrew month of Shvat) is the new year of the trees.
Though Purim is a minor holiday on the Jewish calendar, it is widely observed and a favorite of children.