**In the story 'Ammachi's Amazing Machines', who climbed the tree and worked the pulley to help them climb?**

In the story 'Ammachi's Amazing Machines', it was Ammachi's grandchildren, Meenu and Mithu, who climbed the tree and worked the pulley to help them climb.

**Meenu and Mithu climbing the tree:**

Meenu and Mithu were curious and adventurous children. One day, they visited their Ammachi's house and noticed a tall and sturdy tree in her backyard. The tree looked very inviting, and they couldn't resist the temptation to climb it. With great excitement, they decided to climb the tree to explore the world from above.

**Using the pulley system:**

As Meenu and Mithu reached the top of the tree, they realized that getting back down might be a bit challenging. However, Ammachi had a brilliant idea to help them descend safely. She had created an amazing machine called a pulley system.

**Ammachi's pulley system:**

Ammachi's pulley system consisted of a rope, a bucket, and a small wooden platform. The rope was tied to a branch at the top of the tree, and the bucket was attached to one end of the rope. The other end of the rope was passed through a pulley, which was fixed to a lower branch of the tree. Below the pulley, the wooden platform was secured to the rope.

**Meenu and Mithu's role:**

Meenu and Mithu had to work together to operate the pulley system. Meenu stood on the wooden platform while Mithu held the rope and controlled the movement of the bucket. As Mithu pulled the rope downwards, the bucket moved upward, gradually bringing Meenu down to the ground.

**The teamwork and adventure:**

Meenu and Mithu's coordination and teamwork were crucial in ensuring a smooth descent. They communicated with each other, making sure the bucket was lowered at a comfortable speed. The experience of climbing the tree and using the pulley system made their adventure even more exciting and memorable.

In conclusion, it was Meenu and Mithu who climbed the tree in 'Ammachi's Amazing Machines' and worked together to operate the pulley system for a safe descent. Their teamwork and enthusiasm added a sense of adventure to the story.

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