how to upgrade the kiddie express in hill climb racing

The problem with carriages can make the vehicle hard to use. If both carriages broken, the vehicle will be too responsive to flipping, and overheating inhibits consistent acceleration. Powerful engine and greatly increased fuel duration from upgrades idealize this vehicle for hill climbing/long driving. Also, if the gas pedal is depressed too long, it will overheat, greatly increasing fuel consumption for no extra power. The carriages can be broken off, if given enough and/or repeated force. Bill (the driver) will get covered in soot during the game, more so if the player frequently overheats the vehicle.The Kiddie Express carries two passengers on each carriage, totaling 4 (not Bill).

The passengers in the carriage right after Bill's car are the same passengers in the Hippie Van.The Engine upgrades increases the top speed and acceleration, The Suspension upgrades allows the vehicle to better absorb bumps, The Tires upgrades increases the traction level of Kiddie Express’s tires, The Fuel upgrades allow the Kiddie Express to drive for more time without needing to refuel.

Overheating is not a significant problem, as the temperature rises slowly and cools quickly. Breaking both carriages will cause the vehicle to become unstable. The Kiddie Express carries two passengers on each carriage, totaling 4 (not Bill).

How to upgrade the kiddie express in hill climb racing