From the menu choose play then "Gather" and play first stage (easiest imo). To make it easy to get every token (spinning black trees) put it on easy difficulty. If you pass by one either get it on the next lap or turn around and get it. Since your on easy you can take your time on collecting these as the A.I. is very slow. 3 laps and 8 tokens to catch. Achievement unlocks at the end of the race with all 8 tokens at 1st, 2nd or 3rd place.