Therapy putty is simple to make at home with a few common household ingredients. You can create a batch in under ten minutes, and the two most popular methods use either cornstarch with dish soap or white glue with borax. Each produces a different texture and resistance level, so the best choice depends on whether you want something soft and squeezable or firm and stretchy.
Cornstarch and Dish Soap Method
This is the easiest recipe and requires no special ingredients. You need one cup of cornstarch and half a cup of dish soap. Pour the cornstarch into a bowl, add the dish soap, and stir with a spoon or spatula until the mixture is fully combined. Once it holds together, take it out and knead it by hand for a minute or two until it reaches a smooth, uniform consistency.
The texture of this putty is soft and pliable, closer to a gentle resistance level. If it feels too dry or crumbly, add a small splash of dish soap. If it’s too runny, mix in more cornstarch a tablespoon at a time. This version works well for light hand exercises and sensory play, though it won’t provide the heavy resistance that commercial therapy putty offers. It’s also a good option for young children since it contains no borax.
Glue and Borax Method
This recipe creates a firmer, stretchier putty that more closely mimics the feel of store-bought therapy putty. You’ll need one cup of white school glue, one and three-quarter cups of water (divided), and one teaspoon of borax powder.
Start by combining three-quarters cup of water with one cup of white glue in a bowl. Stir until they’re evenly mixed. In a separate bowl, combine the remaining one cup of water with one teaspoon of borax and stir or shake until the borax fully dissolves. Then slowly pour the borax water into the glue mixture, stirring continuously. A ball of putty will form as the two liquids combine. Once it pulls together into a cohesive mass, remove it from the bowl and knead it with your hands until the texture is even.
The result is a bouncy, elastic putty with noticeably more resistance than the cornstarch version. You can adjust firmness by varying the amount of borax slightly: a little less borax produces a softer, stickier putty, while the full teaspoon gives you a firmer ball.
Safety Considerations for Borax
Borax is generally safe for skin contact during normal use. The absorption rate through skin is very low, estimated at about 0.5% of the boron that touches your hands. The German Federal Institute for Risk Assessment found that skin absorption during typical play accounts for roughly six percent of total boron exposure from putty, with the rest coming from any accidental ingestion.
That said, homemade borax putty can contain more boron than commercially produced versions, which are manufactured to meet regulated limits. For children under three, avoid the borax recipe entirely and stick with the cornstarch method. For older children, make sure they don’t put the putty in their mouths. Swallowing borax in larger amounts can cause nausea, vomiting, diarrhea, and stomach pain. If you’re making putty for a young child or someone who might mouth it, the cornstarch and dish soap version is the safer choice.
Adding Color and Scent
Plain putty works fine for hand exercises, but adding color and scent turns it into a more engaging sensory experience. A few drops of food coloring mixed in during the stirring stage will tint the putty without changing its consistency. For scent, a drop or two of essential oil works well. Lavender is a popular choice for its calming properties and has been associated with reduced heart rate, lower blood pressure, and overall relaxation. Peppermint or citrus oils can make the putty feel more energizing.
Add any extras during the initial mixing step, before the putty fully sets, so they distribute evenly. Start with just one or two drops of essential oil. You can always add more, but too much can make the putty oily or overpowering.
Adjusting Resistance for Hand Exercises
Commercial therapy putty comes in graded resistance levels, from extra-soft to extra-firm. You can roughly replicate this range at home. The cornstarch recipe produces something in the soft-to-medium range. The glue and borax recipe lands in the medium-to-firm range. To push the borax putty toward firmer resistance, use slightly more borax (up to about one and a half teaspoons) or reduce the water in the glue mixture by a couple of tablespoons. Both changes create a stiffer final product.
For progressive hand strengthening, you might make two or three batches at slightly different ratios so you can work your way up. Squeeze the softest one first as a warm-up, then move to the firmer batch for strengthening. Common exercises include squeezing the putty into a fist, spreading it apart with your fingers, pinching it between your thumb and each fingertip, and rolling it into a ball with one hand.
Storage and Shelf Life
Homemade therapy putty dries out quickly if left in the open air. Store it in an airtight container immediately after each use. A small plastic food container or a sealed zip-top bag both work well. Press out as much air as possible before sealing.
The cornstarch version is the less durable of the two. It tends to dry out or develop an odd texture within a few days to a week, even with proper storage. The glue and borax version holds up longer, often lasting a couple of weeks before it starts to harden or get sticky. If either putty begins to feel stiff, you can try kneading in a tiny amount of water or dish soap to revive it, but eventually you’ll need to make a fresh batch. Since the ingredients are inexpensive and the process takes less than ten minutes, making a new one is usually easier than trying to rescue an old one.