Box Construction and using the hot glue gun

This week at Kindergarten we have been learning to use the hot glue gun for creating box robots and many other different creations that the children have wanted to make.  

Box construction provides opportunities for children to explore scientific and mathematical concepts as they combine boxes and other materials together into three dimensional structures. As children construct they develop skills for problem solving, investigating, applying and reflecting on learning. What could I do differently next time?  What worked and what didn't?