Trade-You Negotiation Game

A two-child trading game that teaches the mechanics of bargaining — making an offer, accepting or refusing, sweetening the deal — in a fun, no-stakes format. Built from the research finding that 5-year-olds share more when they understand reciprocity and that practice in cooperative trade games transfers to real sharing behaviour.

  1. Set out 8–12 small “tradeable” items between two children — small toys, cards, blocks, pebbles, stickers, tokens. Variety matters: some prized, some plain. They do not have to be identical sets.
  2. Each child picks 4 items as their starting stock. Alternate picks. The stockpile is “theirs” for the game.
  3. Teach the trade move. Player A says: “I’ll give you my red car for your green block.” Player B says yes or no. If yes, swap. If no, A can sweeten ("…and my blue card too") or accept the no and try elsewhere.
  4. Add the “no haggling after no twice” rule. After two refused offers, A moves on or tries a different item. Keeps the game from devolving into pressure.
  5. Play 6–8 rounds, alternating who proposes. Praise elegant offers (“That was a generous trade”) and elegant refusals (“You said no without making him feel bad — that’s a skill”).
  6. Debrief. “What was a trade that felt good?” “What was hard about saying no?” Connect to real life lightly: “When you and your sister want the same truck, sometimes a trade is a way to get something each of you wants.”

Variation: silent trade (gestures only — builds non-verbal negotiation); sweetener-only trade (every offer must include two items, not one); three-way trade (A wants B’s, B wants C’s, C wants A’s — triangulated trade is more abstract and works for 6+); real-life trade — when a fight breaks out over a toy, ask “is this a trade-you moment?”

Requirements

  • Space: A table, rug, or floor — any flat shared surface
  • Surface: Flat
  • Materials: 8–12 small varied items per pair (toys, blocks, cards, pebbles, stickers); optional small bowls or trays for each child's stockpile
  • Participants: 2 children (siblings or friends); 3 for the triangulated version
  • Supervision: Light — adult sets up, models the first round, then withdraws to observation

Rationale & Objective

Negotiation is the adult-form skill that conflict resolution is leading toward; at 5 it can be practised in the explicit, scaffolded form of a game long before it can be used flexibly in real conflict. Brownell & Carriger (1990) document the gradual development of cooperative exchange in early childhood; Sebastián- Enesco & Warneken (2015) specifically found that five-year-old preschoolers share more with partners when they anticipate reciprocation — directly evidence that practising the give-and-receive loop strengthens prosocial sharing. Cooperative play research (Bay- Hinitz, Peterson & Quilitch, 1994; recent replication in the Journal of Experimental Child Psychology, 2019) consistently shows that after a cooperative game, prosocial behaviour rises and aggression drops compared to competitive play. The game also builds theory of mind: making an offer requires modelling what the other child values, and reading their face for whether the offer landed. Honest framing: the game is a rehearsal, not a fix for high-stakes real conflicts — it gives the child a verbal/cognitive structure (“trade-you for…”) that can be borrowed in heat. One caveat: if the items are wildly mismatched in desirability, the game can entrench inequality between the children; rotate who picks first and keep the pool roughly balanced.

Progress Indicators

  • Early: refuses to trade anything; cannot tolerate a “no”; tries to take items by force; the game collapses within two rounds
  • Developing: makes simple offers (one-for-one); accepts most yes/no outcomes with adult prompting; occasionally sweetens; gets frustrated but recovers
  • Proficient: makes thoughtful offers (modelling what the other might want); accepts refusals gracefully; sweetens; reads the other child’s interest
  • Advanced: proposes a real-life trade during an actual conflict (“Let’s trade — you can have the truck, I’ll take the magnets”); reads emotional cues, not just verbal ones; can negotiate three-way swaps

Safety Notes

  • The game must remain a game — coercive trades (“you have to trade me your toy”) are not trades, and the line matters; an adult bystander stops the game if pressure replaces offer
  • Beware of unequal-power pairings (older sibling pressuring younger); pair children of similar developmental level when introducing the game
  • Do not use the game to mediate a real conflict where one child is the wrong-doer — they don’t earn a trade for hitting; the game is for symmetric shared-resource moments
  • Watch for buyer’s-remorse meltdowns (“I want my red car back!”); the 5-minute take-back rule for early sessions reduces these (after the game, anyone can ask to undo one trade); phase the rule out as resilience grows
  • For mixed-age siblings, the younger may not yet understand “no” — start with parent-as-partner versions until both children can hold the structure
  • Do not allow the trading game to involve food, comfort items (a special blanket, a beloved stuffed animal), or anything one child has just received as a gift — those are not tradeable in the spirit of the game

Hints

  • Playfulness: set up a “market stall” with a tea-towel as the counter; each child wears a vendor apron or hat; play “market voices” (“Step right up!”); add play money for a market-economy version (also builds early maths)
  • Sustain interest: rotate the tradeable pool weekly; add a “trader-of-the-week” certificate for elegant offers; introduce the silent version, the three-way version, the sweetener-only version one at a time
  • Common mistake: letting the offers escalate into pressure (“please please please”); skipping the debrief (which is where the meta-skill consolidates); using too-prized items (the game becomes high-stakes and feelings get hurt); using it to settle a real grievance
  • Limited space: trade with 4–6 small pebbles, cards, or buttons — the game fits in a shoe-box; paper-token trade — tear paper into 8 tokens, each child decorates 4, then trade
  • Cross-domain: count items being traded (numeracy); name colours and shapes of items (early classification); read the other child’s expression for yes/no (theory of mind); model what the other might want (perspective-taking); use the I-Feel Statement Practice when a refusal stings; pair with the Peace Rose Ritual if a trade dispute escalates
  • Progression: parent-child trade game (parent models all moves) → child-child with parent watching → child-child unsupervised → child uses “trade-you” mid-real-conflict → child negotiates flexible non-trade compromises (a turn-based deal instead of a swap)

Sources

  • Sebastián-Enesco, C. & Warneken, F. (2015). “The shadow of the future: 5-year-olds, but not 3-year-olds, adjust their sharing in anticipation of reciprocation.” Journal of Experimental Child Psychology, 129, 40–54
  • Brownell, C. A. & Carriger, M. S. (1990). “Changes in cooperation and self-other differentiation during the second year.” Child Development, 61(4), 1164–1174
  • Bay-Hinitz, A. K., Peterson, R. F. & Quilitch, H. R. (1994). “Cooperative games: A way to modify aggressive and cooperative behaviors in young children.” Journal of Applied Behavior Analysis, 27(3), 435–446
  • Warneken, F. & Tomasello, M. (2009). “Varieties of altruism in children and chimpanzees.” Trends in Cognitive Sciences, 13(9), 397–402
  • House, B. R., Silk, J. B., Henrich, J. et al. (2013). “Ontogeny of prosocial behavior across diverse societies.” PNAS, 110(36), 14586–14591
  • Webster-Stratton, C. (2011). The Incredible Years. Incredible Years Inc. — sharing and cooperative play components
  • Tomasello, M. (2009). Why We Cooperate. MIT Press
  • Damon, W. (1977). The Social World of the Child. Jossey-Bass
  • Schmidt, M. F. H. & Sommerville, J. A. (2011). “Fairness expectations and altruistic sharing in 15-month-old human infants.” PLOS ONE, 6(10), e23223
  • Head Start ELOF — Social and Emotional Development (P-SE 9: cooperative behaviour; P-SE 10: positive relationships with peers)
  • CASEL — Relationship Skills (collaboration, negotiation); Social Awareness (perspective-taking)
  • PBS Kids for Parents — “Molly’s Barter and Trade Challenge Game” (practitioner activity guide)