Making eggheads and growing watercress hair is so much fun for kids and the whole family. This is a fun activity that children can do at home, may need adult supervision. Easy to make and see the children's face every morning as they watch the fast growing hair appear. We hope you enjoy this activity as much as we did. If you have any other ideas for home based fun activities for children then let us know in the comments section below. šBasics needed for this activity: Egg, Felt tip pen, Cotton wool, Cress seeds.