After Nadav and Avihu died, Hashem warns us about entering the Kedosh Kedoshim except for the Cohen Gadol on Yom Kippur. We also hear about the two goats, one offered to Hashem and one sent to the wilderness with our sins. In Kedoshim, we get many mitzvot : Shabbat, honesty, charity, and the often-quoted “Love your fellow as yourself.”
Links: Here are the Aish (Acharei Mot / Kedoshim), Torah.org, and Chabad (Acharei / Kedoshim) pages on Acharei – Kedoshim. Here are some coloring sheets, a parsha song (Acharei – Kedoshim), and a fun video from Itche Kadoozy.
Make meringues using white ingredients (like the Cohen’s garments)
Make a mitzvah jar!
Speaking of a goat – make this goat cheese and roasted beet salad!
Any other ideas?