My Grade 4 - 6 class recently finished these colourful portraits using Sharpies and bleeding tissue paper.
I was inspired by THIS project the the Teach Kids Art website. She saw it originally on the Art Projects for Kids website but I couldn't find the link.
I taught students basic face proportions and they drew a face on heavy white paper.
They then traced over their lines with a permanent black marker.
I precut some various colours of bleeding tissue paper and put them in a box.
I use PACON brand- it's the best and most reliable by far. Students choose two or three colours and cut them into squares.
Then they paint water on their drawing, then put down a square of tissue then a bit more water.
Towards the end they can peel them all off to reveal the colour transfer.
Let these dry overnight!