Motorized Water Creature Kit – DIY Swimming Toy with Propeller, STEM Model
Build a little motorised sea creature: a motor turns the propeller and it swims across a bath or pool.
Designed by Mematrix Lab
Description
Build something that swims
This kit builds a small battery-powered swimming creature. A motor in the body turns a propeller at the back, and the fins keep it steady as it moves across the water. Try it in a bath or a basin and see how the fins change the way it swims.
Science it demonstrates
- Propellers and thrust: pushing water back moves you forward
- Buoyancy: why it floats
- Motors and simple circuits
- Fins and stability
What you'll do
- Fit the motor and battery holder in the body
- Attach the propeller and fins
- Seal the body and install the batteries
- Test it in a bath or basin
Parts list
- Body shell with fins
- Motor, propeller and battery holder
Good to know
- Batteries are not included. Use only with adult supervision near water.
- Contains small parts. Recommended for ages 8 and up, with adult guidance.
Specs and Docs
- Approx. size
- 12 × 4.2 × 5 cm
- Power
- Batteries (not included)
- Material
- Plastic and electronic parts
- Suggested age
- 8+ with adult guidance
Shipping
Standard shipping: $9.00 for the first item, +$1.80 for each additional item. Free shipping on orders over $260.
We ship worldwide, by default with economical international post (UPU / China Post small packet) to keep shipping costs low. Orders are usually handed to the carrier within 2–5 business days, and economical international post then takes about 10–30 business days to arrive; these are estimates, not guarantees. Delivery time depends on the destination and on postal and customs handling. If you need your order by a certain date, email us before ordering: faster shipping can be arranged, with the extra cost charged at the carrier's actual rate. Items that contain batteries or magnets are marked on their product page and ship by a special carrier line; some countries and regions cannot be reached by that line, and if yours is one of them we refund the order in full.
Batteries & magnets
This item contains, or may contain, batteries or magnets (for example in a motor, speaker or rechargeable battery). Ordinary postal parcels with such items may not pass security screening, so it ships by a special carrier line, and its price includes a $10 surcharge for this. Some countries and regions cannot be reached by this line. If yours is one of them, we will email you and refund your order in full.
Customs & duties
Import duties, taxes and customs requirements depend on the destination country, the shipping route and the local customs office, so we cannot say in advance whether any will apply to your parcel. Customs may hold a parcel, ask for more information, or ask for duties or taxes to be paid, even when the declared value is correct. If you have a question about your country, email us before ordering.
See our shipping & returns policy.