puzzTricky printable kriss kross puzzles for kids
The tricky grids are the largest here and the least forgiving: length groups can hold five or six words apiece, so counting letters gives almost nothing away and the entire puzzle has to be built from crossings. There is no forced opening. The child has to pick the slot with the most crossings already touching filled squares and work outwards from there.
These reward a systematic solver and punish an impulsive one, which is exactly why they are worth doing. A child who places words on a hunch will get eight in and hit a contradiction; a child who checks each placement against its crossings before committing will finish. That is a lesson about method, and it lands harder here than any amount of being told.
What is in this pack
| Grid | the largest of the three packs, with the most crossings | |
|---|---|---|
| Word bank | up to five or six words per length group | |
| Opening move | not forced — start from the most-crossed slot | |
| Best for | ages 9-12, and adults who like these more than they admit | |
- Four A4 pagesThree puzzles, then a full answer key. Print the first three only if you would rather keep the answers.
- One verified solution eachEvery puzzle is passed through a solver and discarded unless exactly one answer fits.
- No sign-up, no watermarkA direct PDF download. No email address, no account, nothing to dismiss.
- Free to photocopyUse them at home, in a classroom, at a childminder or in a holiday club.
Teaching tip. If the puzzle collapses into a contradiction, do not restart. Look for the last placement that was made on a hunch rather than a crossing — it is almost always that one, and undoing it usually rescues everything after it.
How to solve a kriss kross puzzle
Never start with a guess. Start with whichever slot has the fewest possible words.
- Count the slots and the wordsLook at the grid and count the length of each empty run. Then look at the word bank, which is already grouped by length. Every slot of a given length must be filled from that length group, and there are exactly as many words as slots.
- Find a length with only one wordScan for a length where the bank holds a single word — or where the grid holds a single slot. That word can only go in that place, so write it in with no risk at all. This is the standard opening move and there is almost always one available.
- Follow the crossingsEvery letter you write down lands in a crossing slot too. Go to each crossing slot and check which remaining words of the right length have that letter in that position. Usually most candidates die immediately.
- Write in pencil and cross words offStrike each word off the bank as you place it. The bank shrinking is what makes the later slots easy, and a word that is still listed but seems to fit nowhere is the clue that an earlier placement was wrong.
- Trust that only one arrangement worksIf two words of the same length both seem to fit a slot, look at their crossing letters rather than picking one. Each puzzle has exactly one complete solution, so any genuine ambiguity means there is a crossing that has not been checked yet.
Who this pack suits
The largest grids, with several same-length words competing for the same slots.
How the kriss kross packs compare
| Kriss Kross pack | Ages | What it asks of them |
|---|---|---|
| Easy | 7-9 | A small grid with short words. Usually one length group has a single word to open with. |
| Medium | 8-11 | More slots and more words per length group, so crossings have to do the work. |
| Tricky | 9-12 | The largest grids, with several same-length words competing for the same slots. |
Questions about this pack
Where do you start a hard kriss kross with no forced move?
With the slot that has the most crossings, not the longest word. A heavily crossed slot constrains the greatest number of other slots, so whatever you eventually place there does the most work.
My child got most of the way and then hit a contradiction. What went wrong?
Almost always a single early placement made on plausibility rather than on a checked crossing. Rather than starting again, retrace to the first word placed without a crossing check and try the alternative.
Is this too hard for a child?
It is at the top of the range — nine to twelve, and best after the medium pack. Plenty of adults find these satisfying too, so working one together is a reasonable evening.
Could two different arrangements both be valid?
No. In addition to counting solutions, the generator explicitly rejects any grid containing two same-length words that could be swapped without breaking anything, so a genuine ambiguity cannot survive to print.
More free worksheets
Other kriss kross packs
Other kinds of puzzle
See all 17 free worksheet packs.
Hundreds more of these in the app
Puzzeroo is an iPhone and iPad app with two hundred word fit levels alongside three other puzzle types — eight hundred in total, all generated by the same verified engines that made this worksheet, all working fully offline with no adverts and no accounts. The worksheets and the app draw from completely separate puzzle ranges, so printing these gives nothing away.