The Inventor's Box — Junk Modeling

Save a box of clean recycling — cardboard tubes, cereal boxes, yogurt pots, bottle caps, egg cartons, scrap paper — and let the child build something that has never existed before. Not a copy of a model, but THEIR invention: a robot, a rocket, a machine that makes breakfast, a home for a worm. The unglamorous materials are the point — a child who turns a tube and a pot into a “telescope” is using materials in a genuinely new way.

  1. Keep an inventor’s box filled with clean junk — tubes, small boxes, lids, corks, paper scraps, string. Add joining tools: child-safe tape, a glue stick, and (for older fives) blunt scissors.

  2. Offer the box with an open prompt — “What could you invent today?” — or a gentle challenge — “Can you build a machine? A vehicle? A creature?”

  3. Let the child lead. They choose the materials, the plan (or no plan), and how to join things. Expect trial and error; wobbly towers and falling-off bits are where the thinking happens.

  4. Help only with the physically hard parts (a tricky bit of tape) when asked — keep the ideas theirs.

  5. When it’s done, ask them to tell you about it: “What does it do? How does it work?” Name and display the invention.

Variation: give it a purpose (“build something to keep a toy dry in the rain”). Add paint or markers to decorate once built. Keep a gallery shelf for inventions, or photograph them in a homemade inventor’s notebook.

Requirements

  • Space: A table or floor with room to spread out; a surface you don't mind getting sticky
  • Surface: Wipeable table or a mat; tape and glue make a mess
  • Materials: Clean recycled containers and packaging; child-safe tape and/or glue stick; blunt scissors; optional markers or paint to decorate
  • Participants: 1 child, or a sibling pair or small group building together or each making their own
  • Supervision: Moderate — close for scissors and around small parts; lighter once the child is safely absorbed in building

Rationale & Objective

Junk modeling is open-ended, process-focused art and design: there is no model to copy and no single right outcome, which NAEYC identifies as the hallmark of process art that builds creativity, decision-making, and agency in young children (Bongiorno, 2014). Building a novel object from raw materials is a child-sized version of the design-and-make cycle Resnick (2017) calls the creative learning spiral — imagine, create, play, share, reflect — and his principle of “low floor, high ceiling, wide walls” describes exactly why a box of junk works: any child can start, and the possibilities are wide open. The activity makes the child’s thinking visible as a construction, echoing HighScope’s emphasis on children representing what they observe, think, imagine, and feel. It targets the subdomain markers “uses art materials in unexpected ways” and “creates an original construction that does not replicate a model,” and the EYFS goal of sharing creations and explaining the process used.

Progress Indicators

  • Early: explores the materials and joins a few pieces with lots of tape, often without a plan; may call it something only after it’s built; the joining itself is the achievement
  • Developing: sets out to make a particular thing and chooses materials for it (‘I need a long tube for the rocket’); accepts that it may not look exactly as imagined; persists through a wobble or two
  • Proficient: plans a multi-part construction, solves joining problems with some independence, and explains what the invention is and does; adapts when something doesn’t work rather than giving up
  • Advanced: designs inventions with a purpose or moving idea (’this part opens’), combines materials in genuinely inventive ways, iterates to improve the build, and narrates an elaborate function

Safety Notes

  • Actively supervise scissors — use blunt, child-safe scissors, teach cutting while seated, and never leave them unattended
  • Prepare recycled materials first — wash food packaging, cut off and discard sharp can rims and lids, and remove staples, button batteries, and small magnets
  • Avoid packaging that held nuts or other allergens if any child has a food allergy, since residue can trigger a reaction
  • Choose non-toxic glue, tape, and markers — look for the AP (Approved Product) seal or a conforms-to-ASTM-D-4236 statement on art supplies
  • Keep small caps and parts away from younger siblings, and watch that decorating materials like beads or googly eyes aren’t mouthed

Hints

  • Playfulness: call the child the inventor and yourself the curious reporter, and interview them about how their machine works. A single cardboard box alone has launched a thousand spaceships, cars, and castles.
  • Sustain interest: keep the box topped up with interesting new junk (an unusual bottle, a giant tube) so there’s always a fresh ingredient; set occasional themed challenges to reignite a flagging interest (‘invent something that flies’).
  • Common mistake: taking over to make it ’look good,’ or expecting a recognizable, neat result — the value is the child’s own design and problem-solving, however lopsided. Offer help with sticking only when asked, and praise the idea, not the neatness.
  • Limited space / no equipment: one cardboard box and a roll of tape is a full afternoon; no tape? Slot and fold cardboard together, or build and rebuild with no joining at all.
  • Cross-domain: planning and joining build problem-solving and early engineering; explaining the invention grows language and confidence; cutting and taping strengthen fine-motor and bilateral coordination; giving the invention a story links to dramatic play.
  • Progression: free joining and exploring → build a named object of the child’s choice → take on a purpose challenge (‘something to carry water’) → add moving or opening parts → decorate and present the finished invention, explaining how it works.

Sources

  • Bongiorno, L. (2014). “How Process-Focused Art Experiences Support Preschoolers.” Teaching Young Children, 7(3). NAEYC
  • Resnick, M. (2017). Lifelong Kindergarten: Cultivating Creativity Through Projects, Passion, Peers, and Play. MIT Press
  • Edwards, C., Gandini, L. & Forman, G. (Eds.) (2012). The Hundred Languages of Children (3rd ed.). Praeger
  • Vygotsky, L. S. (1930/2004). “Imagination and creativity in childhood.” Journal of Russian and East European Psychology, 42(1), 7–97
  • UK EYFS — Expressive Arts and Design — Creating with Materials ELG (share their creations, explaining the process they have used)
  • Head Start ELOF — Goal P-ATL 12 (child expresses creativity in thinking and communication)
  • HighScope KDI 40 (art) and KDI 4 (problem solving)
  • NAEYC — Developmentally Appropriate Practice position statement (2020) — child-initiated, exploratory play