Here is a pic of my daughter's model of an animal cell that she made for her 7th grade Science class. She created it all by herself! She used a plexiglass sign holder, a throwaway Tupperware bowl, a bouncy ball cut in half, yarn, and colored foam and hot glued everything. Her directions said she could not use a styrofoam ball, which seems to be the most popular method. I would give her an A!