A One-Day Clay Project Easy Enough to Do From a Cart

If you only see your students once a week, preserving clay projects between classes can present some major challenges. If you’re in this situation, you may want to consider planning a few one-day clay projects, especially for your very youngest students.

Today I’m sharing a foolproof one-day project that can even be done if you teach from a cart – slam molds!

Yes, you read that right- not slump molds, slam molds! The process is essentially the same as using a traditional slump mold with an extra exciting step. Instead of just draping the slab into the mold, the students SLAM it on the ground to force the clay into the mold. What kid doesn’t love slamming!?

Here are the steps.

mold materials

1. Find Your Molds

A good slam mold has a few key characteristics; it isn’t breakable, it has a very basic shape, and it comes in a large quantity (because each kid’s project needs to dry to leather hard while still in the mold). Therefore, Styrofoam trays are a natural choice.

You could solicit donations, contact a local meat market, or buy them from Amazon. The finished piece is more impressive if it has a little depth, so I recommend hunting for trays that are at least a half inch deep. (The pictures in this article show a set of 5.25-inch square trays that are .88-inch high… yup, from Amazon).

2. Roll Your Slabs

Whether you have rolling pins or a slab roller, the first step is to have your students roll out semi-uniform slabs. Then, students need to cut out shapes that are slightly larger than the mold itself.

rolled and cut slab

Explain that this extra clay will be needed to form the sides of the piece, as the clay is slammed into the mold.

3. Decorate Your Slabs

decorated slab

You can use a variety of decorative techniques. Use texture plates or objects to press into the clay, have kids carve into the surface, or even use alphabet pasta as a way to incorporate text. Don’t worry, it burns off in the firing process!

4. It’s SLAM Time!

Prepare yourself for organized chaos, because it is time to slam the clay… and your students are going to think it is hysterical. Come on, you are throwing art on the ground or the desk!. Have your students drape the clay over the mold and drop it from a small height. You will need to practice this to determine what height is going to work for your kids. I dropped mine from approximately 24 inches for this project. A lot of factors can affect how the artwork falls. Be prepared for a few misfires. I think it’s better to drop it from a lower height repeatedly, to ensure success, but that’s a little less dramatic and exciting.

clay slumped into mold

5. Trim and Dry

After the clay has been forced into the mold, demonstrate how to trim the excess clay off of the edges to make a final product. Then, collect the trays. If you are on a cart, you can even temporarily stack these as you move them to a secure location. That’s the beauty of this project, you get a ceramic firing experience, still contained in a tray for easy transport.

trimming clay

6. Fire and Finish

Leather hard pieces shrink ever so slightly, as the moisture evaporates out of the clay. At this point, you can carefully pop them out of the molds while preserving the molds for another year.

clay piece popped out of mold

You or the students can use a ribbon tool to quickly smooth any rough edges. Finally, follow your normal procedures for a bisque firing. Your slam mold project is complete!

What other one-day ceramics projects do you use with your kids?

How do you provide a ceramic experience while on a cart?

Lindsey Moss

Lindsey Moss is an elementary art teacher in Yorkville, Illinois. She enjoys art history and finding creative and artistic solutions to educational challenges.


  • Mr. Post

    Here is a handy tool for slicing slabs quickly. This one is at Dick Blick and is around $13. https://uploads.disquscdn.com/images/d3526e11cd7e61493a3a7a01c81da175fda70e6344ab5e7230033b83f2beee6e.jpg

    • Elizabeth Elliott

      I just got this and it broke on the first try….

      • Mr. Post

        Usually when they break it is a sign that the clay in the bag is too hard. These only work well with soft clay.

    • K Hyman

      I have had this one for many years. Replaced the wire once. It is the best!

    • Lindsey Moss

      This looks so simple, I can’t wait to order one!!! Thank you for the suggestion John! I love all of your ceramics info/ videos… they are so helpful.

  • Kelly Phillips

    Great idea, Lindsey! Simple and successful.

    • Lindsey Moss

      Thanks Kelly!

  • Mary Rowe

    Is this too easy for 5th grade?

    • Lindsey Moss

      Hi again! I want my older elementary kids to learn hand building skills and successfully attach clay, so I am using this project with my younger students. However, if you are on a cart or have other restrictions that are preventing a clay project, I think a simple clay experience is better than no clay experience! So go for it!!

  • Mary Rowe

    I am curious what brand of clay you use. I usually get my clay from DIck Bick. I am curious which on you recommend.

    • Lindsey Moss

      Hi Mary! I have always purchased Amaco No 25 white art clay from my local Blick store. I recently ordered for Great Lakes Clay (they are local to me) and I’m excited to try their product too. Hope this helps!

  • Lacy Leach

    How much clay do I need per student for that size of tray?
    Thanks, Lacy

    • Lindsey Moss

      Hi Lacy! It feels like I go through approx. a 25 lb bag with each class. So, I would guess-timate about 1 lb per student… depending on how thick you instruct them to make the slab. Hope this helps!

  • Ms. T

    Was there a particular tool used to print the word or name, “MOSS” ?

    • Lindsey Moss

      Hi! Thanks for reading:) So these letters were made with a set of plastic handled stamps that another teacher gave me as a hand me down. I asked when I saw your comment, but no one seems to know where this mystery item originated! Howver, I did a little online research and found these https://www.amazon.com/Alphabet-Number-Dough-Stampers-Uppercase/dp/B004ZAKF1K which appear to be similar but not identical. I hope this helps!!

  • anna nichols

    Thank you for the idea! I am teaching in a new school with fewer resources and I am always on the lookout for ideas like this one.