For school you say, well, we wouldn't want you to fail now would we
Construct a wooden horse frame from Popsicle sticks. Make the frame 1 foot high and 2 feet long. Glue the Popsicle sticks together to form a rough horse. You can slightly break sticks to round the figure off. You'll be covering this later, so there's no need for perfection. You just need something to build on.
Make a papier-maché mixture. You can do this with a fifty-fifty mix of white glue and a mixture that is one part water, one part flour.
Dip newspaper strips into the papier-maché mixture and layer the strips over the Popsicle stick structure. Continue to layer the newspaper strips over the Trojan Horse frame, criss-crossing them as you go. Use plenty of newspaper. You want a thick, strong coat of it.
Let the Trojan Horse model dry for at least 2 hours, then glue thin cedar wood chips all over the entire piece. Be sure none of the newspaper is visible.
Cut a small trap door into the chest of the Trojan Horse model and attach one of the thin pieces of rope to each side of the door and the horse's chest. These represent pulleys.
Cover four plastic bottle caps with glue and fix them to the Trojan Horse model to represent wheels. This will give you your very own representation of the Trojan Horse.