What can a walking stick do for grandpa?

Serve tea and water. Grandpa is in poor health or his legs and feet are inconvenient. Grandchildren and granddaughters can help him when he walks without crutches. This is no ordinary crutch. They can talk and chat with him, tell him stories, tell jokes and sing songs, and also help him run errands, learn to talk and serve tea, so they are called walking crutches.