Your child has the marble run apart again. One ramp goes in upside down, the marble shoots off the edge of the table, and they rebuild the whole thing and drop the marble in from the same spot. Then they do it again. From the couch it looks like messing around.
Some of it is. More of it than you'd guess is an experiment.
Kids start testing on their own
Laura Schulz and Elizabeth Bonawitz at MIT gave preschoolers a toy box with two levers. Some children only ever saw the two levers pushed together, so they had no way of knowing which lever made what happen. Others had seen each lever work on its own. Then the children were free to play with that box or with a brand new toy.
The children left with the puzzle kept going back to the old box, and they spent longer on it than on the new toy. Twelve of the sixteen ended up pushing each lever separately, which is exactly the move that answers the question they'd been left with [1]. Nobody asked them to.
A few years later, Claire Cook, Noah Goodman and Laura Schulz tried something harder. Preschoolers learned that some beads could switch on a toy when they touched it. When children believed only some of the beads worked, many of them set about testing the beads one at a time. In one version the beads came stuck together in pairs, and children worked out that they could touch just one end of a pair to the toy. The researchers wrote that this trick hadn't occurred to them at first [2]. When children believed every bead worked, they almost never bothered.
That's the pattern worth noticing. Kids explore hardest when something doesn't add up. A marble that flies off the table is the reason they lean in.
Why showing them how can shrink the search
This next part is hard for parents. In another study from the same group, an adult set out to show preschoolers how a toy worked, the way a teacher would, and pulled a tube to make it squeak. The toy had other tricks hidden in it too. Children who were taught that way played with the toy for less time, tried fewer different things and found fewer of the hidden tricks than children who just got the toy, or who watched an adult who didn't seem to know the toy make it squeak [3]. The authors describe teaching as a sword with two edges. It helps a child learn the thing you show them quickly, and it quietly suggests there's nothing else to find.
None of that means you should never explain anything. It means the order matters. Let them have a go first.
The tidy version needs a nudge
Testing on their own has a limit, and it's worth knowing about. When lots of things could matter, children tend to change several at once, and then they can't tell which change made the difference. Zhe Chen and David Klahr worked with grade school children on exactly this skill: setting up a fair test where only one thing changes. Asking good questions by itself didn't help much. A short, plain explanation of the strategy, combined with those questions, did, and many children carried it over to new problems [4].
So the urge to test shows up early. The habit of changing one thing on purpose usually needs someone to name it once.
What you can say at home
When the marble flies off the table again, try one of these before you reach for the ramp:
- "What do you think will happen this time?" Ask before they let go. A guess turns a drop into a test.
- "What's different from last time?" If the answer is "everything," you've found your opening.
- "Want to try changing just the top ramp?" That offers them a way to test. The choice of what to try still belongs to them.
If they rebuild it the same way and drop it from the same spot, wait a beat. Then ask what they noticed. You'll often hear a theory you didn't expect.
How we build this into a game
In one of our games, a child's job is to get a ball to roll into a cup. Each puzzle opens with a setup that doesn't work, and only one part of the machine glows, the part they're allowed to change. We kept it to one on purpose, so every run answers a single question. When the ball misses, the character asks what to look at ("The cup is still waiting. Which side of the board is lower?") before it ever suggests what to do, and the reason the ball rolled waits until the child has made it work. It's the same guess, run and look loop that sits at the heart of early coding, and it lives in the same uncomfortable moment we wrote about in why getting stuck helps kids learn.
We have not measured our own results yet, so everything above about how children learn comes from the wider research.
If you'd like to see the first games when they open to families, you can join the waitlist.
References
These studies describe children in general. They are not findings about Wonderix.
[1] Schulz, L. E., & Bonawitz, E. B. (2007). Serious fun: Preschoolers engage in more exploratory play when evidence is confounded. Developmental Psychology, 43(4), 1045-1050. https://doi.org/10.1037/0012-1649.43.4.1045
[2] Cook, C., Goodman, N. D., & Schulz, L. E. (2011). Where science starts: Spontaneous experiments in preschoolers' exploratory play. Cognition, 120(3), 341-349. https://doi.org/10.1016/j.cognition.2011.03.003
[3] Bonawitz, E., Shafto, P., Gweon, H., Goodman, N. D., Spelke, E., & Schulz, L. (2011). The double-edged sword of pedagogy: Instruction limits spontaneous exploration and discovery. Cognition, 120(3), 322-330. https://doi.org/10.1016/j.cognition.2010.10.001
[4] Chen, Z., & Klahr, D. (1999). All Other Things Being Equal: Acquisition and Transfer of the Control of Variables Strategy. Child Development, 70(5), 1098-1120. https://doi.org/10.1111/1467-8624.00081