Practice problems eat paper. A child who is nervous about getting it wrong writes small, hesitates, and won't cross anything out — but on a board, wrong costs one wipe. That is the real use for these: the board on the wall by the study desk, one colour for the question, one for the working, one for the answer, one for the bit the teacher underlined. Four colours also stop a full board turning into one grey mass by Thursday.
— The Ghalyh team · How we pick
Good for
Home study boards and revision · fridge and office planners · notes on glass and shop windows
Not for
Paper, walls and fabric — dry-erase ink only lifts off a smooth non-porous board or glass. It is also the wrong pen for labelling: anything you want to still read next month needs permanent ink.
Specifications
- Set
- 4 colours
- Ink
- Dry-erase — for whiteboards and glass
- Care
- Cap on tight; store lying flat so the tip stays wet
Questions people ask
Can I write on a window or a glass door?
Yes — glass is non-porous, so dry-erase behaves the same as on a board. Wipe the glass with a dry cloth first; dust under the ink is what makes writing smear.
It skips when I write — is it finished?
Not always. Keep the cap on and store markers lying flat instead of standing tip-up, so the ink sits at the tip. If it still skips after that, it is genuinely dry.