dip a cup or toilet paper roll in paint and make circles on a piece of paper then paint however you like!

“kaleidoscope painting” paint the lid of a cup (or toilet paper roll) with black paint and use it to stamp overlapping circles. once it dries, paint inside each shape with a different color.

DIY Leaf Stamp. No paint required!

DIY Leaf Stamp is a photo, craft tutorial using the natural pigment in leaves to make a stamp on stationary or other surfaces. - My DIY Tips

sensory balloon with matching cards

sensory balloon with matching cards. great for teaching 5 senses to preschoolers or keeping toddler hands busy! Except make balloons all one color, or else they'd memorize the color rather than rely on senses to determine contents.