Changes for the task are required:
Must be at least a certain width (10cm)
Would only give them 2m of tape 1 week and 1m the second week
Must look like a bridge not a ramp
May change to allow parts touching the ground but would be from their items only
Sinkers worked really well with the overall weight distribution
Ideally this is something that would be revisited after initial to try and beat initial weight level.