GraviTrax Expansion Hammer – Ravensburger Marble Run Add-On (Ages 8+)

Give your marble the ultimate boost! The GraviTrax Expansion Hammer by Ravensburger adds a thrilling hammer action element to your marble run — launching your marble further and faster than ever before. Build it, test it, and watch physics come alive!

🔨 What's in the Box

• ⚙️ 1 Hammer action module — the star of the show
• 🛤️ 1 long plastic rail + 3 short plastic rails
• 🔵 3 medium marbles
• 📚 Instructions included (D, F, I, EN, NL, E)
• ⚠️ Requires a GraviTrax Starter Set to use

✨ Why STEM Fans Love It

• 🧠 STEM-certified — teaches physics, force, and momentum in a hands-on way
• 🏗️ Fully compatible with all GraviTrax sets
• 👨‍👩‍👧 Perfect for 1+ players — solo or family fun
• 👶 Recommended for ages 8 to 99
• 🏆 By Ravensburger — trusted makers of premium STEM toys
• 🌱 FSC certified — made responsibly

🎁 The Perfect Add-On Gift

Already have a GraviTrax Starter Set? The Hammer expansion is the perfect next step — compact, exciting, and endlessly replayable. A great gift for curious kids and adults who love a challenge!