Nesting Cups
Three cups, three sizes: the smallest always ends up inside the biggest.
Nesting Cups is a Montessori activity for a child aged 12 to 18 months. Area: Fine Motor. Time: 5-10 min.
What the activity builds
Discover the idea of size through action, with a control of error that's entirely mechanical.
The materials
- Three cups or measuring cups, clearly different sizes
- A tray to define the workspace
- Cups all one color, so only the size varies
How to do it, step by step
- Line up the three cups on the tray, biggest to smallest.
- Pick up the smallest and slide it slowly into the middle one.
- Slide the whole thing into the biggest, then take everything back apart.
- Slide the tray toward them and wait.
- Let them try, even out of order: the cup will simply refuse to fit.
The parent's role
Show once, then step back. Don't redirect their hand. The big cup won't fit inside the small one, and it's the material that tells them so, immediately, with no judgment attached. That's exactly what's called the control of error.
Safety
Choose cups with no sharp edge, big enough not to be swallowed, made of rigid plastic or light stainless steel, never glass. Check that none can get stuck on a hand: a narrow cup can squeeze a wrist.
You remain the sole judge of what is right for your child. These activities are offered for educational and recreational purposes: they do not replace medical advice or the guidance of an early childhood professional.
Ways to adapt the activity
- Easier: two cups, strongly contrasted.
- Harder: five cups, two of them close in size.
- Extension: stacking them upside down to build a tower.
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