Cut out the leafy top of a large carrot to make a hollow hole.

Put in a 5 centimetre (2 inch) straw and seal it with wax from a melted candle. Be careful!

Take toothpicks and stick them into the carrot so it can be hung in a glass of food-coloured water.

Watch your carrot for a day or two.

Take a picture of your carrot and send it in (as a jpeg or mail it as a print), and Global Forest will post it in the GF-Gallery along with your name and we will send you a GF sticker for your collection.