Which Popin' Cookin' Kit Is Hardest to Make? It Comes Down to the Microwave
Share
People assume the hardest Japanese DIY candy kits are the fiddly, detailed ones — the tiny sushi, the miniature burger with all its layers. But after making these kits over and over, we've found the real difficulty divider isn't detail at all. It's one specific step: whether the kit sends you to the microwave. Get that one distinction, and you can predict how likely a kit is to go wrong before you open the box.
Two Different Kinds of "Hard"
When people ask which kit is difficult, they're usually mixing up two very different things. There's fiddly — a kit with lots of small, delicate steps that takes patience — and there's risky — a kit where a step can genuinely fail and leave you with a mess. They feel similar in the box, but they're not the same at all.
A fiddly kit is slow but forgiving. A risky kit is faster but unforgiving. And the single thing that turns a forgiving kit into an unforgiving one, in our experience, is heat and precise timing — which almost always means the microwave.
The Difficulty Tiers
Here's how we'd group the DIY candy world by how likely you are to actually mess it up — not by how impressive the finished result looks.
Nerunerunerune & Friends
Knead a powder with water and watch it fizz and change colour. No heat, no exact timing, only a few minutes. It's almost impossible to get wrong — which is why it's the classic first kit. Meet it properly in our feature on the original that started it all.
Assembly Kits Like Sushi
These have lots of small steps — shaping, piping, plating — so they take 20–30 minutes and a steady hand. But there's no heat, so a slow, careful maker basically can't fail. They look hard; they're really just patient.
Kits That Use the Microwave
The Hamburger Set is the classic example: it needs heating, and heating is where things go sideways. Too long in the microwave, slightly off measuring, and the result changes. This is where genuine failures happen.
Steps & Measuring
The more steps a kit has — and the more it depends on exact measuring — the more room there is for a small slip to snowball. Heat plus many steps is the combination that trips people up, not detail on its own.
Where to Start, Honestly
If it's your first time, or you're handing a kit to a child, our answer is simple and it hasn't changed: start with Nerunerunerune. It gives you the full "wow" of DIY candy — the fizzing, colour-changing magic — with essentially zero chance of failure. It builds confidence before you ever touch a kit that needs the microwave.
From there, move up to a no-heat assembly kit like sushi, where the only challenge is patience. Save the heating kits for when you already know how the candy behaves. We break the whole progression down by skill in our skills-based age guide, and if you want a straight ranking of the kits themselves, we made every one and ranked them best to worst.
How to make any kit easier
- Respect the microwave step above all others. If a kit heats something, that's the moment to slow down, watch closely and under-do rather than over-do the time. It's the step most likely to fail.
- Measure water carefully. Many "failures" are really just too much or too little water — the amount matters more than it looks.
- Read every step before you start. Kits with more steps aren't harder if you know what's coming; they're harder when a step surprises you halfway through.
- Match the kit to the maker. Give a young child a mixing kit, not a heating one — the difficulty gap between those two is bigger than any detail on the box.
- Not sure which to buy first? Our Popin' Cookin' vs Nerunerunerune guide walks through exactly who each one suits.
Frequently Asked Questions
Which Japanese DIY candy kit is the easiest to make?
Nerunerunerune. You just knead a powder with water — no heat, no precise timing, and only a few minutes — so it's extremely hard to get wrong. That's why it's the classic first kit for children and beginners.
What makes a Popin' Cookin' kit difficult?
In our experience it's heat and exact timing, not detail. Kits that ask you to microwave something for a set number of seconds are the ones where genuine failures happen. Fiddly assembly kits take patience but are much harder to actually ruin.
Which kit is the hardest?
Kits that use the microwave, like the Hamburger Set, are the trickiest — heating plus precise measuring leaves the most room for a small slip to change the result.
Are detailed kits like sushi hard?
They're fiddly rather than risky. They have many small steps and take time, but with no heating involved, a patient maker can nearly always get a good result.
What should a complete beginner start with?
Start with a mixing kit like Nerunerunerune, move up to a no-heat assembly kit such as sushi, and only then try a kit that needs the microwave once you know how the candy behaves.
And one kit is difficult for a completely different reason - no microwave at all, but four items to get looking right: the festival kit.
Start Easy, Level Up Later
Every PopnCandy Tokyo box is packed with authentic Japanese DIY candy kits and treats — 12 to 15 items including 2+ hands-on kits, shipped straight from Tokyo.
See the Plans