Have done this with children from 2.5 years and up
Easy felting, most children will master this. Have done this with children from 2.5 years and up. Let the child make a small lump from a wet paper towel, put a layer of thin wool on the outside and put it all in a small plastic bag with a little green soapy water.
Let the child roll, squeeze/massage etc. on the outside of the plastic bag, the wool will stick/felt. Add more wool and continue. When the paper is no longer visible, you can say you're done. The eggs must dry and can then be hung up or placed in a bowl as decoration.