Building an animal cell model is one of the most common middle school science projects, and you can make an impressive one using items already in your kitchen, junk drawer, or craft bin. The key is choosing the right household object for each organelle so your model is both accurate and easy to explain. Below is everything you need: which parts to include, what to use for each one, and two different approaches depending on whether you want an edible or non-edible model.
Organelles Your Model Needs
A standard animal cell model should include seven to nine organelles. Here are the ones most teachers expect to see:
- Cell membrane: the outer boundary that holds everything together and controls what enters and exits the cell
- Cytoplasm: the gel-like fluid filling the cell, made mostly of water, nutrients, and waste products
- Nucleus: the control center that holds the cell’s DNA and directs its activities
- Endoplasmic reticulum (ER): a folded network of tunnels that helps build proteins and transport materials
- Golgi body (Golgi apparatus): a stack of flat layers that packages and ships proteins out of the cell
- Ribosomes: tiny dot-like structures scattered around the cell that assemble proteins
- Mitochondria: bean-shaped powerhouses that convert food into energy the cell can use
- Lysosomes: small round sacs filled with enzymes that break down waste and old cell parts
- Vacuoles: small storage bubbles that hold water, nutrients, or waste
One critical detail: animal cells do not have a cell wall, chloroplasts, or a large central vacuole. Those belong to plant cells. If your model includes any of those, you’ll lose points. Animal cells are also irregularly shaped (round or blob-like), not the rigid rectangle you see in plant cell diagrams. Lysosomes and centrioles are unique to animal cells, so including them shows your teacher you know the difference.
The Jello Method (Edible Model)
The most popular approach uses Jello as the cytoplasm inside a bowl that acts as the cell membrane. It looks great, it’s easy to build, and you can eat it afterward.
Start by preparing a batch of light-colored Jello (lemon or lime works well because you can see through it). Make it according to the package directions, pour it into a large round bowl, and refrigerate it until it’s partially set, about 90 minutes. You want it thick enough to hold objects in place but not fully solid. The bowl itself represents the cell membrane, giving the cell its shape and holding everything inside.
Once the Jello is at that halfway-set stage, press your organelles into position:
- Nucleus: a large round fruit like a plum, peach half, or a baseball-sized gumball. Place it slightly off-center, just like in a real cell.
- Mitochondria: lima beans, jelly beans, or small pickles. Their oblong shape is a natural match. Place two or three scattered around the cell.
- Endoplasmic reticulum: fruit roll-ups or fruit leather, folded and crumpled into a wavy ribbon shape. Position it near the nucleus, since the ER connects to the nuclear membrane in real cells.
- Golgi body: a stack of flat ribbon candy pieces, or several layers of fruit leather stacked and slightly curved. Place it near the ER but not touching.
- Ribosomes: sprinkles, small candy beads, or nerds candy. Scatter them throughout the Jello and also press some onto the surface of your ER to represent the “rough” endoplasmic reticulum.
- Lysosomes: round jawbreakers, gumballs, or grapes. Use two or three small ones.
- Vacuoles: small grapes or blueberries work well. Animal cells have several small vacuoles rather than one large one.
After placing everything, return the bowl to the fridge and let the Jello set completely (another two to three hours). The Jello locks every piece in place, giving you a model you can carry to school without everything sliding around.
The Non-Edible Method (Craft Supplies)
If you need a model that lasts longer or don’t want to deal with refrigeration, a craft-based version works just as well. Use a shallow round container, a paper plate, or a large plastic lid as your base (the cell membrane). Fill it with modeling clay, play dough, or even a layer of clear hair gel for the cytoplasm.
For the organelles, raid your junk drawer and craft bin:
- Nucleus: a bouncy ball, tennis ball cut in half, or a ball of dark-colored clay
- Mitochondria: dry kidney beans or lima beans (their shape is almost identical to real mitochondria)
- Endoplasmic reticulum: pipe cleaners bent into a wavy, folded pattern, or crumpled pieces of ribbon
- Golgi body: several rubber bands stacked flat, or layers of cardboard cut into slightly curved strips
- Ribosomes: beads, lentils, peppercorns, or small pom-poms. Glue some onto the ER and scatter the rest.
- Lysosomes: marbles or small buttons
- Vacuoles: small buttons or sequins in a different color from the lysosomes so your teacher can tell them apart
If you’re using clay as the base, press each item firmly into the surface. If you’re using a plate or lid, hot glue works best for keeping everything attached during transport.
Labeling and Presentation Tips
Most teachers grade on labels as much as the model itself. Use small flags made from toothpicks and tape (or sticky notes cut into strips) to label each organelle. Write the name on the flag and stick the toothpick into or next to the corresponding part. For a non-edible model, you can also run string from each organelle to a label on the outside edge of the plate.
Color contrast matters more than you might think. If your cytoplasm is yellow Jello, avoid yellow candy for your organelles. Each part should be visually distinct so it’s easy to point to during a presentation. Using a different color for every organelle also makes your model look more polished.
If your assignment asks for a written component, prepare a short description of what each organelle does. Teachers tend to award extra credit when students can explain function, not just name parts. A quick cheat: the nucleus is the “brain,” mitochondria are the “batteries,” the Golgi body is the “post office,” lysosomes are the “recycling center,” and the ER is the “highway system.” These analogies are simple, but they show you understand the biology behind the model.
Common Mistakes to Avoid
The number one error is making the model square or rectangular. Animal cells have soft, rounded, irregular shapes. A round bowl or circular plate keeps you safe. Second, don’t include a cell wall. The cell membrane is the outermost layer of an animal cell. A cell wall is thicker, rigid, and only found in plants. If you wrap your model in cardboard or a hard shell, it looks like a plant cell.
Another frequent mistake is making the nucleus too small. In a real cell, the nucleus is the largest single organelle and takes up a noticeable amount of space. Choose something proportionally large, roughly one-fifth to one-quarter the diameter of your container. Finally, don’t clump all the organelles in the center. In a living cell, organelles float throughout the cytoplasm, so spread them out for accuracy.