Exist 2 materials with you can dye: watercolors and vegetable dyes.
If you decide to paint with vegetable dyes only have to replace the water for alcohol and the watercolors for vegetable dyes at the same measure. (Quantity of alcohol and vegetable dyes depends of how quantity paste you want to dye).
*If this activity is realize for your kids bear in mind always they need the adult supervision.
You should try this clay with your children. You should note eat it, but if your children does, it is no toxic at all.
How to make it: