Stand up tall and take a big step froward so that when you bend your knees your front knee stays above the ankle. Try to get deep enough in the lunge position that your back knee touches the floor, or comes close. Then step the back leg to meet the front and continue forward.
Get in a Reverse Tabletop position with your hands under your shoulders and your knees over your ankles. Lift your hips off the floor by squeezing your glutes (Torso does not need to be parallel to the floor, hips just need to be lifted). Begin kicking one leg up and alternating legs, while keeping your body stable and not rocking. If you want more of a challenge, once you kick your leg up, reach your opposite arm up to touch your foot. Alternate sides.