How to use: First, you can push the semi - truck around for simple play. To start a race, pull the back latch to unfold it into a six - foot long racetrack. Place your cars in the dual launcher in the cab. Press the launcher to start the head - to - head race. If you want to connect it to other Hot Wheels City sets, just attach the tracks. You can use the naverter to hold cars back or send them down the connected tracks. Attention: Keep small parts away from kids under 3 to avoid choking hazards. Make sure the latch is properly closed when not in use. Maintenance: Wipe the toy with a dry cloth regularly to keep it clean. Store it in a dry place to prevent damage. Don't expose it to extreme temperatures or moisture.