Lateral Skating
Staying in a slight squatted position, step out to one side and slightly forward with one leg, immediately repeating the process over to your other leg, so that your covering the ground to your front and both sides.
Use your arms to aid your balance, lowering down with each movement, naturally bringing your other foot close to the foot on the floor, however aim to keep that foot off the floor.
You will find that this exercise will work both your lower leg an also those of your inner and outer thigh muscles.