TinyStepper
Child holding a torch making shadow puppets on a wall in a dim room

Posting Box Surprise

Cut holes in a cardboard box and post different shaped objects through — a problem-solving game that rewards persistence.

Activity details

12m–2y15 minslowindoorBallsBuilding BlocksCardboard BoxesToilet Roll Tubes

Instructions

Get ready
  • Take a sturdy cardboard box and cut two or three holes in the lid — one round, one rectangular, one square. Make them slightly larger than the objects so success is achievable.
  • Gather posting objects: a ball for the round hole, a building block for the square, and a toilet roll tube for the rectangular one.
  1. Take a sturdy cardboard box and cut two or three holes in the lid — one round, one rectangular, one square. Make them slightly larger than the objects so success is achievable.
  2. Gather posting objects: a ball for the round hole, a building block for the square, and a toilet roll tube for the rectangular one.
  3. Show your child one object and the box: 'Can you post the ball? Which hole does it fit through?'
  4. If they try the wrong hole, say 'Hmm, it doesn't fit there. Shall we try another one?' Keep your tone curious, not corrective.
  5. When the ball drops through, shake the box gently: 'I can hear it inside! You did it!'
  6. Let them try the next object. If they need help, guide their hand toward the right hole but let them push it through.
  7. Open the box together to 'discover' all the posted objects — the reveal adds a surprise element each time.
  8. Repeat as many times as your child wants — the repetition is where spatial understanding deepens.

Parent tip

Set out balls and building blocks before inviting your toddler in so the first minute feels smooth.

Toddler at a table with a completed puzzle and neatly sorted blocks in a bright aha moment

What success looks like

Intense focus, even briefly. Watch for the small ‘aha’ moment when they figure out how something works.

A cardboard box with different shaped holes becomes a posting toy that challenges your child to figure out which object fits through which gap. This is spatial reasoning made tangible: rotating, angling, and trying different orientations until the object drops through. The moment of success — hearing the thud as the object lands inside — provides instant, satisfying feedback. For children with learning differences, the trial-and-error format teaches that wrong attempts are part of the process, not failures.

Why it helps

The NHS Best Start in Life programme identifies problem-solving and decision-making among the key cognitive skills that develop through active play. Shape sorting develops spatial awareness, problem-solving, and persistence — three skills that underpin mathematical and scientific thinking. The trial-and-error process builds what developmental psychologists call 'means-end thinking': the understanding that a specific action leads to a specific outcome. For children with cognition and learning needs, the physicality of the task (grasping, rotating, posting) provides kinaesthetic learning that bypasses the need for verbal instruction.

Variations

  • Use different sensory objects: pom poms, fabric scraps, wooden spoons — each feels different to post and makes a different sound landing.
  • Wrap the box in wrapping paper and let your child poke through to create their own holes — this reverses the challenge.
  • For older toddlers, make holes closer in size to the objects so more precise rotation and angling is required.

Safety tips

  • Sand or tape any rough edges around the cut holes to prevent cardboard scrapes.
  • Ensure posting objects are too large to be a choking hazard and do not have sharp corners.
  • Supervise scissor use if your child wants to help cut — only adults should handle the craft knife or scissors for box cutting.

Want to try another?

Kitchen Cupboard Discovery

Get weekly activity ideas for your toddler

One email a week with practical toddler activities, behaviour tips, and developmental insights. No spam, unsubscribe any time.