GraviTrax Junior - Advent Calendar 2026

Build anticipation this holiday season with the GraviTrax Junior Advent Calendar 2026. Open a new surprise each day to discover marble run pieces, track segments, and special accessories that unlock endless creative possibilities. Perfect for children aged 3+, this calendar combines the joy of daily discovery with hands-on STEM learning. Each piece connects seamlessly to expand your marble run universe, encouraging spatial reasoning, problem-solving, and imaginative play. Beautifully packaged and ready to gift, it's the ultimate countdown to Christmas—transforming December into 24 days of building, experimenting, and fun.