Students will be using this as a base for a river model to demonstrate erosion. The base will be covered with wet sand to model soil on top of the bedrock(plastic). Children will place small houses on the model. They will then pour water at the top of the slope to to simulate rain.

https://tinkercad.com/things/0AZn6gbjPnZ-soilprofile-maker-faire

The yellow and red files are to be used with dualstrusion on a Replicator. The 16 houses are to be placed on the banks of the river after you cover the entire model with a layer of wet sand.