Put QR codes on children's drawings where they talk about their work. Or maybe record a video of how they made it. This way it is easier for other to understand what it is about and remember later.
How to do it:
Open Cloud QR Generator and choose Talking image or Record audio.
Record when the child is talking about the drawing.
Take a picture of the drawing (if using Talking image).
Press Save to upload the audio and picture to the cloud.
Press Share, Print and place the QR code on the drawing.