A special collection of the 3 most popular M:TRON models. Great fun building all thre models! BUT THE FUN CONTINUES–you'll also receive another set of building instructions to combine these 3 sets into the secret M:TRON Space Voyager. Ages 8-12. 333 pieces. Save 10%–SPECIALL PRICED at $41.85 Secret M:Tron Space Voyager includes: #6923 Particle Ionizer, #6877 Vector Detector, and #6896 Celestial Forager. • Bonus Instructions Included