Hello! Thank you so much! So happy you liked our performance!
Basically a mdf (a type of wood) core was separated into three pieces with spring hinges..the rest of the bow was built up around this base with balsa wood and spray putty, and there were further springs added onto the branches. The whole thing folds down a bit like a ruler and was secured with a ribbon for onstage. When you pull the ribbon and flick the bow…it pops due to the springs pulling it open.
..I hope that helps and we’ll honestly try to get a video of it up or something in future!