The previous directions posted aren't good anymore, the bridge over 291 has been shut down.  Here are alternate directions:

• Take I-70 to Little Blue Parkway
• Exit at Little Blue Parkway and turn left
• Take Little Blue Parkway until you run out of road R.D. Mize. (you'll cross 39th street and the street turns into Salsa.)
• At R.D. Mize, turn left.
• It's not far before the church is on your left (the road will start to go uphill).
• Walnut Gardens, Community of Christ Church
  19201 R. D. Mize Road, Independence MO 64057