GraviTrax Junior - Extension Trax

GraviTrax Junior - Extension Trax gives children from the age of 3 a child-friendly introduction to themed marble track worlds. The GraviTrax Junior - Extension Trax set is perfect for taking those first builds even further. With 35 extra track elements, columns and platforms, this expansion gives young engineers more ways to twist, turn, climb and race their marbles across the landscape. The chunky, easy-grip pieces are designed with younger learners in mind, making it simple to connect ramps and curves while experimenting with longer or more complex routes. Whether you are extending a Starter Set or creating a fresh layout, Extension Trax adds new possibilities for problem solving, collaboration and imaginative storytelling as marbles whizz through jungle treetops, icy caves or around friendly animals from other themed sets. Ideal for STEM corners, construction tables or project work, this versatile pack keeps interest high as children discover that a tiny change in height, angle or direction can completely change the marble's journey.

Educational Benefits

• Develops early engineering skills as children extend, adapt and refine their existing GraviTrax Junior layouts.
• Strengthens understanding of gravity, slope and motion through trial and error with different ramp heights and track directions.
• Supports fine motor control and spatial reasoning as learners connect pieces accurately and visualise how the marble will travel.
• Encourages perseverance and problem solving when marbles stop or derail, prompting children to rethink and adjust their designs.

Classroom & Play Activity Ideas

• Set a "longest track"  challenge where small groups use Extension Trax to create the most extended route that still runs smoothly.
• Invite learners to design a track that includes a "slow section"  and a "fast section"  and talk about what makes the difference.
• Use the set in STEM rotations where children first draw a simple plan of their track, then build and test it.
• Combine with themed decoration extensions and ask children to tell a story about the marble's journey through their imagined world.

Product Details

• 3-7 years; always use under adult supervision.
• 35-piece extension set featuring extra GraviTrax Junior track sections, supports and connectors.
• Compatibility: designed to expand GraviTrax Junior starter sets and other Junior extensions (each sold separately).
• Safety information: contains marbles and small parts; not suitable for children under 3 years. Inspect components regularly and remove from use if any piece becomes damaged or excessively worn.