In the course of all the trips to Lowes for this project, we also discovered the greatest, cheapest toddler toy ever. PVC! Whole bags of connectors for a couple dollars and 6 feet of PVC for a dollar. Yay for cheap building toys!
The PVC fun also led to the discovery of a strange Ava behavior. Build PVC into a cross, hold it in front of her, and she does this...every time.