Structural Truss Overhang: Spaghetti Cantilever Challenge
An engaging, screen-free learning activity that builds real-world creativity and critical thinking for kids aged 7 to 9.
Materials Needed
- • Dry uncooked spaghetti noodles (20 strands)
- • Fresh mini marshmallows (firm texture) (15)
- • Standard steel paperclip (bent into S-hook) (1)
- • Standard metal pennies or uniform washers (10)
- • Heavy hardcover textbook (counterweight) (1)
Pro Tips
- → Remind kids that squares collapse under diagonal load, but triangles are self-bracing and rigid.
- → Anchor the base of the cantilever firmly on the tabletop using a heavy hardcover book.
- → Measure horizontal reach beyond the table edge before testing load-bearing capacity with pennies.
Safety First
Do not eat marshmallows handled with glue or floor dust. Be careful of snappy spaghetti fragments.
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Step-by-Step Instructions
Step 1
Assemble triangular trusses by puncturing miniature marshmallows with dried spaghetti strands, creating interlocking tetrahedron units.
Step 2
Connect 3 consecutive trusses to extend a horizontal arm that projects unsupported past the perimeter of the dining table.
Step 3
Anchor the table-side of the structure with a heavy book, then affix a bent paperclip hook to the far tip of the overhang.
Step 4
Incrementally hang pennies from the hook one by one until reaching failure point; record max load and failure fracture location.