Level 1 is on your knees. Level 2 is on your toes...the whole time! Thanks to Rom Riad from Live Active Personal Training for modelling.
This is my favourite. I can turn up, do some bear crawls and these and I will be good to squat in 5mins or less.
This Child's Pose Complex - Level 1 is a nice way to integrate a lot of different movements.
This is a nice complex of movements. It allows the thorax, back, hips, knees and sciatic nerves to warm up through movement.