Quick answer

Grow toys work by soaking up water: a compressed figure or shell absorbs water and expands into a larger shape over a set number of hours. The Toysmith Grow Unicorn starts as a pink tree stump and becomes a unicorn over 48-72 hours with no batteries, just a container of water. Buy it if your child enjoys watching a slow change and can wait a day or two; skip it if you need instant play.

What actually happens in the water

The toy is made from a superabsorbent material that pulls water into its structure. As water moves in, the material swells and the shape changes. That is why grow toys feel slightly damp and soft after soaking, and why they shrink again if they dry out. The Toysmith Grow Unicorn follows this same process: the pink tree stump absorbs water and gradually opens into a unicorn shape over 48-72 hours.

Because the change is driven by absorption, the water matters. Use room-temperature water and a container deep enough to fully cover the toy. Cold water slows the process; very hot water is not necessary and can distort the shape. Expect the most visible change in the first 12 hours, with the final details filling in over the next day or two.

How to set it up without a mess

Place the toy in a clear bowl or jar so kids can watch from the side. Fill with enough water to cover it completely, then leave it somewhere it will not be knocked over. A windowsill or kitchen counter works well, but direct hot sun can dry the edges. Check once or twice a day and top up the water if the level drops.

After the growth period, lift the toy out and let it drain on a plate or towel. It will stay expanded while it remains damp. If it dries out, it will shrink and harden, but you can soak it again to restart the expansion. That reusability is a real advantage over one-time craft kits, though the shape may not return to exactly the original size each time.

What to expect from the Toysmith Grow Unicorn

This is a small, low-cost grow toy, not a large playset. The appeal is the transformation and the patience it teaches. The 48-72 hour window means it works best as a multi-day activity rather than a single afternoon. Kids who like checking progress each morning will get the most from it. The catalog lists it at USD 5.99, which makes it an easy add-on or party favor.

One honest limitation: the catalog does not specify the final expanded size or the exact recommended water temperature. If size matters for your container, start with a bowl that is wider and deeper than you think you need. That avoids a mid-growth transfer, which can interrupt the shape.

Where grow toys fit alongside other play

Grow toys are a slow-burn activity, so they pair well with faster toys for the same child. A child who is waiting on the unicorn can still play with a shark figure or mini dinos in the meantime. The key is matching the toy to the child's attention span: grow toys reward observation, while animal figures and mini collectibles reward immediate hands-on play.

If you are buying for a classroom or a group, grow toys work as a shared science-style demo. One toy in a clear container can be checked by several kids. For solo play, a single grow toy is enough; buying multiples does not speed up the process, it just gives you more containers to manage.

Decision rules for buying grow toys

  • If your child can wait 48-72 hours: Choose the Toysmith Grow Unicorn. The payoff is the visible change over two to three days, and the toy can be re-soaked after it dries. Best for patient kids who like checking progress.
  • If you need play in the next hour: Skip grow toys for now and choose a figure like the Toysmith Epic Shark - Great White or Toysmith Mini Dinos. These are ready to play immediately and do not need water or drying time. Match the toy to the moment, not the other way around.
  • If you are buying for a group or classroom: One grow toy in a clear container is enough for a shared demo. Add low-cost mini figures so every child has something to hold while the grow toy expands. Pair one slow toy with several instant-play items.
  • If storage or mess is a concern: Grow toys need a water container and a draining spot. If you do not have a safe ledge or counter space, choose dry toys instead. Plan the container before you buy.

Products that fit grow-toy play

  • Toysmith Grow Unicorn: The Toysmith Grow Unicorn is a water-activated toy where a pink tree stump transforms into a unicorn over 48-72 hours, with no batteries required. This is the core grow-toy experience: a slow, watchable change that needs only water and a container.
  • Toysmith Epic Shark - Great White: The Toysmith Epic Shark - Great White is a nontoxic, soft, durable plastic shark measuring nearly 21 inches long, suitable for indoor, outdoor, and water play. A good companion for kids who want immediate water play while a grow toy is still expanding, and large enough for classroom demonstrations.
  • Toysmith Mini Dinos: Toysmith Mini Dinos are small, portable dinosaur figures in a variety of bright colors, sold at a low per-piece price. Useful as a quick-play option during the 48-72 hour grow period, or as a low-cost party favor alongside a grow toy.

Who should buy a grow toy

Best for

  • Kids ages 5 and up who enjoy watching a slow transformation and checking it daily
  • Parents or teachers looking for a low-cost, battery-free water activity
  • Shoppers who want a small gift or party favor with a built-in reveal

Not for

  • Kids who want immediate play and will lose interest during the 48-72 hour wait
  • Households without a safe spot for a water container
  • Buyers expecting a large or highly detailed final figure