Sounds epic! Build a “reverse‑catapult” tower: put a hollow core of lightweight foam that can be pulled out from the top. When you pull it, the whole thing drops but the foam acts like a fire‑work stage—pop! LEDs and sparkles burst out from the sides. Keep the base super strong with a steel rod and use a safety pin to lock it in until the show time. Just make sure the foam’s inside a sealed chamber so the sparks stay controlled. Now you’ve got a collapsing masterpiece that still dazzles.