Time boxing progress their is good, but it also helps to explain how to ask for help. I tell them if they get stuck to give me a short writeup on the objective,

Time boxing progress their is good, but it also helps to explain how to ask for help. I tell them if they get stuck to give me a short writeup on the objective, what they tried, why it didn't work, and their questions. It makes them reflect on their work and helps me understand what they need. After a few times, they can usually solve most of their own problems.