How to make a mystery pixel art activity
- Add a simple picture: an emoji, a cartoon, a seasonal image or a flag. 16–32 cells across and 4–8 colours work best.
- Type your questions, one per line as question | answer. Add extra accepted answers with more | separators.
- Check the preview: hover over the picture to see which part each question reveals.
- Download the .xlsx and open it in Excel, or upload it to Google Drive and open it with Google Sheets.
What students see
- Questions in column A and yellow answer boxes in column B.
- A ✓ or ✗ in column C as soon as they type.
- An empty grid that fills in, piece by piece, with every correct answer, until the whole picture appears.
Sharing it with a class in Google Classroom
- Upload the .xlsx to Google Drive and open it with Google Sheets (File › Save as Google Sheets).
- Create an assignment, attach the sheet and choose “Make a copy for each student”.
- Students type their answers; you can open each copy to see how far they got.
Ideas that work well
| Subject | Questions | Picture |
|---|---|---|
| Maths | Times tables, fractions, equations | Emoji, pumpkin, snowman |
| Languages | Vocabulary: word → translation | Flag of the country |
| Science | Chemical symbols, planets, body parts | Atom, rocket, heart |
| Revision | Key terms before a test | School mascot or logo |
Without questions, the same picture can be made into a plain Excel pixel art sheet, or a printable color by number worksheet.
Frequently asked questions
How does a mystery pixel art activity work?
Students type answers in the yellow cells. Each correct answer colours part of the picture through conditional formatting, so the picture appears bit by bit and students know at once whether they were right. A ✓ or ✗ also appears next to each answer.
Does it work in Google Sheets?
Yes. Upload the .xlsx to Google Drive, open it with Google Sheets (or File › Import), then share a copy with each student, for example through Google Classroom with “Make a copy for each student”. It also works in Excel, LibreOffice and Numbers.
How do I accept more than one answer?
Add them on the same line separated by |, for example: Capital of the UK | London | london city. Capital letters and extra spaces are ignored.
Can students see the answers?
Answers are stored in the conditional formatting rules and in the ✓ formula, so a determined student could find them in the sheet’s settings. For practice and homework this is rarely an issue; for tests, protect the sheet or hide column C.
What pictures work best?
Simple pictures with clear shapes and few colours: emoji, cartoons, logos, flags, seasonal clip art. Use 16–40 cells across and 4–8 colours.
Are my pictures uploaded?
No. Everything happens in your browser, so your pictures never leave your device.
Last updated 2026-10-24.