Ladder
From The Blockheads Wiki
A ladder is a tool that allows you to climb up or down faster once placed. Ladders are made in batches of 10, and can be made at the woodwork bench. Each batch of 10 ladders takes 1 wood.
Ladders can be removed by clicking on them. Removing the ladder your Blockhead is holding onto when there is nothing else nearby to grab is the only verified way to fall.