This deal has ended.
This best-selling K'Nex Angry Birds Advent Calendar drops from $39.99 to $19.99 at Amazon. It includes building bricks, 8 figures, a launcher, and Christmas items that you open each day for 24 days. Shipping is $5.05 or free over $35 (or click here to get free shipping with a 30-day Prime membership trial). Sales tax is charged in most states.