IMR Add on Pack - Inserts Theme:Red more lanes

more lanes

and add the unpredictable traffic that makes head-to-head racing dramatic

and the close-contact moments where marbles collide and battle for position

Sizing XS(2/4) S(6/8) M(10/12) L(14/16) XL(18/20) Width 15 16 17 18 19 Length 19 20 22 24 25 Center Back Sleeve Length 11

CARDBOARD NOT INCLUDED

IMR Add on Pack - Inserts Theme:Red more lanesInsert Variety Pack: One of Each Type Plus Half Track One of each IMR insert type plus a half track section so you can experiment with every customization option in the IMR system. Inserts are specialty pieces that drop into existing track sections to change marble behavior adding pathway dividers, speed bumps, or design variations to tracks you've already built. This variety pack is the easiest way to try every insert type before deciding which ones