I know it doesnt help, but this is exactly what i have to do and its due tomorrow!! sorry i couldn't help, but everyone, pleasee give us any ideas!!
To make a 3D model of the human skeleton you can use toothpicks to simulate the bones.
Nino
use a styrofoam ball and paint it :)
Dont be an idiot 5 year olds can't use 3D Editing software.
with some Styrofoam balls
well, you can go to other sites
With glue or tape, possibly with markers or paint even!
If you want to make a project on uniform circularmotion you can give real life examples like on a merry go round or a carousle and you can make or stick the paper news paper models to your paper project which Makes it a 3d project.
3D printer
I was searching for the same question for my chem. project and i came across it on ehow.com search for it there.
Buy some Crayola Model Magic and make a 3D model. After looking at photos of a koala bear or a wallaby (Discoveryschool.com) paint the model with craft paint and let dry.
you use the bathroom make sure you poo then take it out and fill it with mustard