Grow a Yeti Instructions: Setup, Care, and Troubleshooting

The Yeti grow kit you're most likely holding is the Toysmith Hatchin' Grow Yeti (model SKU 6913), a water-activated expansion toy where a cartoon yeti figure "hatches" out of an iceberg and swells up to 3 times its original size, reaching about 4 inches tall, after roughly 48 hours submerged in water. It's not a plant or mushroom kit, it's a water-swelling foam or polymer toy, which means the setup is much simpler than a traditional grow kit but also easy to mess up if you're expecting it to behave like one.

Which Yeti kit do you actually have?

Toysmith's Hatchin' Grow Yeti (SKU 6913) is the one most people are searching for. The box shows a friendly cartoon yeti encased in a small iceberg-shaped block. The concept is the same as other water-grow toys in this genre, similar to grow-a-dinosaur or grow-a-unicorn kits, but themed around the classic bigfoot-style yeti character. If your box says "Hatch N Grow Yeti" or just "Grow Yeti" and has that Toysmith branding, you're in the right place.

If you have something completely different, a novelty planter shaped like a yeti, or a mushroom kit with a yeti brand name, the core advice below will still help orient you, but check your packaging carefully since the care steps will differ significantly from what's here.

What you need before you start

The good news: this kit needs almost nothing extra. Here's a quick checklist before you fill anything up.

• A container deep enough to fully submerge the iceberg block (a cereal bowl or medium glass bowl works perfectly)
• Plain tap water at room temperature (cold is fine; avoid hot water)
• A flat, stable surface away from direct sunlight and heat sources
• A few minutes of patience at the start, then mostly just waiting
• Optional: a ruler if you want to track growth over 48 hours

That's genuinely it. No grow lights, no pH testing, no fertilizer, no special substrate. This is a toy kit, not a cultivation system, so don't overthink it. The only real setup decision is picking the right bowl, you want it wide and deep enough that the yeti block sits fully underwater without being propped up on the sides.

Step-by-step setup instructions

1. Take the yeti iceberg block out of the packaging and set it on a flat surface for a moment while you prepare your container.
2. Fill your bowl with enough room-temperature tap water to completely submerge the block. Cold tap water works great; just avoid hot water, which can deform or damage the expanding material.
3. Place the iceberg block into the bowl so it's fully underwater. If it floats, you can gently weigh it down with a small object (like a spoon resting across the top of the bowl) or just check back after 10 to 15 minutes once it starts absorbing water and settles.
4. Set the bowl somewhere stable, at room temperature, away from direct sunlight and heat vents. A kitchen counter or table works well.
5. Leave it undisturbed. Check on it every few hours if you like — you'll start seeing the yeti figure emerge from the iceberg fairly quickly — but resist the urge to poke or squeeze it while it's still swelling.
6. Give it the full 48 hours submerged for the best result. Toysmith and retailers like Kohl's specifically state it grows up to 3 times its original size after 48 hours, so pulling it out early will leave you with a partially expanded yeti.

Watching it grow: what to expect day by day

This isn't like a plant where you're watering every day and managing light cycles. The whole process is a single extended soak. That said, here's roughly what you'll notice as it progresses.

The main thing to manage during those 48 hours is keeping the water level up. If the bowl is shallow, some evaporation might expose the top of the figure. Just add a splash of room-temperature water to keep it covered. For more grow toys in water instructions, focus on using room-temperature water and keeping the toy fully submerged during the soak. That's the entire ongoing care routine for this kit.

Common problems and how to fix them

The official Toysmith documentation doesn't include a troubleshooting section, but based on how these water-expansion toys work, here are the issues that trip people up most often.

The yeti isn't growing much

Nine times out of ten, this is a patience problem. People check at the 10-hour mark, see it at maybe 1.5 times size, and assume something went wrong. Stick with the full 48 hours. If it's genuinely not moving at all after 12 to 24 hours, try these things: make sure it's fully submerged (not just sitting in a shallow puddle), make sure the water is room temperature (very cold water can slow the absorption), and check that the figure isn't packed too tightly in the container to expand.

The water is getting cloudy or smelly

With water-expansion toys, you can sometimes get slight cloudiness or a faint smell from the polymer material releasing into the water, this is normal and not dangerous, but you can swap in fresh room-temperature water partway through if it bothers you. Don't use hot water when refreshing, and avoid scrubbing the figure while it's still expanding since the surface can be fragile mid-soak.

The figure feels mushy or slimy

This is expected while wet, water-expanding foam and polymer toys get soft and gel-like when fully saturated. That's the material doing exactly what it's designed to do. Once you remove and air dry the figure, it'll firm back up. If it still feels slimy after a full air dry (24+ hours out of water), that's unusual, but again Toysmith's official guidance is to rinse gently and let it dry completely.

Part of the yeti isn't expanding evenly

This usually means part of the figure wasn't fully submerged. Flip or reposition it gently and make sure the whole thing stays under water. Some iceberg-shaped blocks have flat bottoms and can trap an air pocket underneath, pressing it down gently and releasing usually helps it settle and absorb water on all sides.

Hot water was used accidentally

Toysmith specifically says to avoid hot water. If the figure was exposed to hot water, especially early in the soak, the material can warp or lose its shape before it fully expands. Unfortunately there's no real fix for this one after the fact. For future kits, always use cold or room-temperature tap water.

Finishing the cycle: removal, drying, and storage

Once your yeti has reached its full size (around 4 inches tall, 3 times the original size, typically at or after the 48-hour mark), here's what to do to finish the cycle properly.

1. Carefully lift the expanded yeti figure out of the water. It'll be soft and squishy at this point, so handle it gently to avoid deforming it.
2. Give it a gentle rinse under cool tap water to remove any residue from the soak water.
3. Set it on a dry surface — a paper towel or a plate works fine — and let it air dry completely. This can take several hours to a full day depending on your environment.
4. Once dry, store the figure in a cool, dry place away from direct sunlight and heat sources to preserve its texture and shape.

Toysmith doesn't officially confirm whether the Hatchin' Grow Yeti can be re-soaked for another full expansion cycle. Some water-expansion toys do allow a partial re-swell if dried completely and re-submerged, but you're unlikely to get the same 3x result a second time. Treat it as a one-cycle toy and enjoy it as the display figure it becomes once dried. If you want to repeat the experience, the kit is inexpensive enough that getting a fresh one is the most reliable path.

Safety, realistic expectations, and getting help

This kit is designed as a STEM observation toy, not a cultivation system, so don't stress about water quality, fertilizer, or grow schedules the way you might with a plant or mushroom kit. If you also have a Dino World Mega Grow set, follow the instructions that came with your exact model so you use the right water and timing for safe, full expansion STEM observation toy. It's a great introduction to the concept of water absorption and material expansion for kids, and a fun novelty for adults. The most important safety notes from Toysmith: avoid hot water throughout the whole process, and keep the figure out of direct sunlight during both the soak and the storage phase, since UV and heat will degrade the material over time.

Realistic expectations: you'll get a soft, expanded yeti figure that's roughly 4 inches tall. It won't be rigid like a plastic toy, it has more of a foam or rubbery feel when fully expanded and dried. The colors and details should be visible and intact as long as you avoid hot water and rough handling. If something about your kit is genuinely defective, the block crumbled before you started, the figure has no definition at all, that's worth contacting Toysmith about directly.

Toysmith's customer service is available Monday through Friday, 8:00am to 5:00pm PST, via both email and phone. If the instructions that came with your specific kit are unclear or missing, that team can walk you through the exact steps for your model. If you need grow unicorn in water instructions, look for the same water-soak method and temperature guidance used for similar water-expansion kits exact steps for your model. It's worth a quick call or email if you're stuck, especially since the in-box manual for this product is notoriously minimal. If you're looking for my first Crayola Grow-With-Me Easel instructions style guidance, start by following the steps included with your exact kit, since care timing can vary by model.

If you enjoy water-grow toys and want to try others in the same family, the same genre includes grow-a-dinosaur and grow-a-unicorn kits that follow nearly identical steps, submerge, wait, rinse, dry, with the same general 48-hour timeline and 3x size increase you'd expect from this Yeti kit. They make fun comparison sets if you want to run a few at once.