Got a question on YouTube about how one could approach reassembling pieces with Ragdoll, here’s what I came up with. 
- reassemble.zip (85.5 KB)
In a nutshell, this is Pin Constraints on all Jenga pieces. The first one tilts the tower over, the others are activated shortly thereafter to bring them back to where they were. Because there isn’t a straight path between where they landed and where they started, they would struggle to reach their position due to contacts with other pieces. So a Newton Field is added to try and give them a jolt. After 3 attempts, it gives up.
Scene and rag file attached!