Notes:

1. Number 22 may take some time to develop. Both hands and feet are playing paradiddles, but reverse sticking from each other.
2. Number 23 just involves three limbs for now. I'm sure this one will develop over time allowing for many variations to add the fourth limb (snare). Playing paradiddles with the feet, the ride can be played with either the left or right hand to help develop timing.
3. Number 24 is another left-side vs right-side. See if you can figure out what each side is playing.
4. Number 25 is the hardest of the lot. Paradiddles with the hands, the feet play singles with a 16th triplet at the end to reverse the lead foot.
   
   

Exercises