9M+: Place a vehicle on the floor, facing baby but slightly out of reach, and encourage baby to reach and grasp to pull it near.

9M+: Place a vehicle in front of baby and slightly to one side, and encourage baby to roll the vehicle from one hand to the other.

9M+: Identify the different vehicles: taxi, police car, fire truck, school bus. Help baby to pat each vehicle as you say its name.

12M+: Place two vehicles on the floor and help the child bump them together.

12M+: Help the child identify the different colors on the vehicles. Say a color name aloud and guide the child's finger to point to a vehicle with that color.

12M+: Line up the vehicles in a row and count them aloud. Ask the child to pat them along with you as you count.

18M+: Sitting a few feet away from a wall, encourage the child to roll back a vehicle and let it go to try to reach the wall.

18M+: Count different parts of a vehicle, such as all the wheels or tags. Ask the child to point and count along with you.

18M+: Use the vehicles to tell a story, describing the people and animals inside and drawing inspiration from other details, such as the fire hose, stop sign, and passengers.