Didax Unifix 100 Track
The Unifix 100 Track measures a full 72 5/8" long and consists of ten interlocking sections. Each grooved section is numbered from 1-10 on the bottom and according to the section's place in the 1-100 sequence on top, marked in increments of 11-20, 21-30, etc. This is an excellent visual aid for counting, measurement, and addition. Unifix Cubes sold separately.