Children can build a 3-D cell using only fruit and jelly. A half papaya, watermelon or melon makes a good base to start the project. Seeds and part of the pulp are removed, creating a cavity where the liquid jelly is poured. Smaller fruit, such as berries and grapes, are placed in the jelly to represent the nucleus and the organelles. The model stays in the fridge till the jelly is hard. It is also possible to build a 3-D cell using different pasta types and shapes, as well in the form of a cake.
The plasticity of clay makes it a popular choice for 3-D cell projects. Children can use gouache to paint cytoplasm, nucleus and each organelle with distinct colors. Alternatively, clay can be used as the cell base, while beads, buttons or other materials represent the organelles. Papier-mache, which is a paste made with paper and glue, or Play-Doh can also be used.
The exclusive use of recycled materials to build a 3-D cell model can also teach children about the importance of reusing to reduce waste. Cardboard boxes, cans or transparent plastic bottles can serve as the base to build the cell. Nucleus and organelles can include bottle lids and corks, old toothbrushes and combs, ice lolly sticks and used matches. To fill the cell's base, children can use old wrapping paper or fabric.