Spider Push-Ups: Show the students how to place both hands together with palms and fingers touching. Then, show them how to push the hands away from each other at the palm. The fingertips should remain in contact.
Finger Pick-Ups: The students should stand at their desk and place their hands flat on the desk surface. They can then pick up each finger in isolation. Ask them to raise each finger from the desk surface 3 times and then pick up and hold each finger individually for several seconds.
Fingertip Touch: Ask the students to touch their thumbs to the tips of each of the fingers. They can do both hands at the same time or one hand at a time. Then, ask them to touch the tip of their thumb to the base of each finger. They can touch the tip or base of each finger at different speeds, as they spell words, or count in various increments. Next, ask them to touch the tips or bases of each finger with their hands held behind their back or out of their field of vision.
All these ideas and the video come from the link below. It has a LOT of information at the beginning and the list of these and other exercises are near the bottom.