Easy is signed a bit like almost, so be careful not to get the two confused.
To sign easy, hold both hands up in front of your body, palms facing up and fingers held together on each hand. Then, while keeping the non-dominant hand steady, flick your dominant hand upward while touching the fingers of the steady, non-dominant hand several times.
Teach your baby or toddler the easy sign when you acknowledge to them that they did a task easily, and you are congratulating them for a job well done. Otherwise, teach them this sign when you see that they are hesitating to do something that they think is hard. Just encourage them patiently and gently to mirror your actions, and sign and say 'easy' as you smile and repeat the action together until they get it.