Jewish holidays are simply introduced to toddlers with colors to exemplify. The apples we eat on Rosh Hashanah are red, and the flames of the Shabbat candles are orange.

Preschoolers learn about numbers as they count ritual objects relating to Jewish holidays.

Preschoolers learn about the cycle of the Jewish year beginning with Rosh Hashanah where the shofar is loud, and prayers are quiet. 

Toddlers learn about Jewish holidays and ritual objects with primary shapes and bright colors: the yellow circle matzah ball, the oval egg on the seder plate, the triangle hamentashen...

Toddlers can conceptualize the Jewish holidays with customary sounds starting with the sound of the shofar for the New Year, "swish" of the lulav on Sukkot and the sizzle of frying latkes on Hanukkah.