Build an arch that stands on its own — mechanics you can feel

This wooden Beili / da Vinci-style arch bridge DIY uses notched interlocking beams — no glue, no nails. Compression and friction lock the curve into a self-supporting structure. Built for science demos, STEM workshops, and focused weekend making at home.

Unlike a ready-made bridge toy, the learning is in aligning, keeping symmetry, troubleshooting, and rebuilding. When the arch rises and holds under a gentle press, questions like “why doesn’t it fall?” become the best STEM starting point. “Da Vinci-style” is educational physics naming only — not franchise IP.

Who is it for? Age & STEM skills

Suggested age 7+ (adult help for first build). Great for curious builders and primary science extensions — not a plug-and-play decoration.

• Science — compression, friction, balance, force along an arch
• Building — notch alignment, left/right symmetry
• Fine motor & spatial skills — careful seating of each beam
• Problem-solving — collapse, reset, check symmetry

How to build & play

1. Sort notched beams by size; check the parts list.
2. Start from the feet; establish a symmetric base.
3. Raise the arch gradually; avoid forcing one side ahead.
4. Gently press to feel whether the structure holds.
5. Optional: observe with a light object only — never stand on it or overload it.
6. Disassemble and rebuild — timed challenges or two-person builds.

In the box

• Wooden notched beams / arch parts (count as shipped)
• Instruction guide (language and exact count as shipped)

Parent FAQ

Q: Glue, nails, or batteries?
A: No — pure interlocking structure; fully non-electric (no motor, battery, or magnets).

Q: What age?
A: 7+ with adult help for the first build.

Q: How much weight can it hold?
A: Teaching model only — light observation objects; not a play structure to stand on.

Q: Is “da Vinci” a licensed character?
A: No — educational mechanics naming only.

Safety tips

• Ages 7+; adult supervision for assembly.
• Small parts — not for under 3.
• Non-electric; do not modify with powered parts.
• Do not stand on or overload; keep parts out of mouths.

A hands-on STEM kit that makes arch mechanics visible — build it, press it, rebuild it.