Get creative with the galaxy eye

What can I use if I don't have a sponge, medium flat brush, or a toothbrush?

If you don't have a sponge use a crumpled paper towel or makeup sponge to press color for the step 'Use the sponge to press deep blue onto the outer edge of the iris', swap the medium flat brush for a wide craft or house paint brush to 'Wet the inside of the iris gently', and replace the toothbrush splatter by flicking a stiff small paintbrush or tapping white paint with the toothpick to 'Flick the toothbrush or tap the brush to splatter tiny white stars'.

My colors are running or turning muddy—what should I do?

If colors run or become muddy after wetting the iris or overlapping blue and purple, blot excess water with a paper towel, mix paint with less water on your palette, and follow the instruction to 'Let the painted layers dry completely before adding dark or white details'.

How can I modify this activity for different age groups?

For preschoolers pre-sketch the eye and have them dab washable paints with the sponge under supervision, for elementary kids follow every step including the small round brush and toothbrush splatter, and for teens encourage precise color mixing, glazing between layers on the palette, and fine starburst lines with the toothpick for more detail.

How can we extend or personalize the galaxy eye painting?

Enhance the piece by adding metallic or iridescent paint when you 'add teal into the inner ring', using glow-in-the-dark paint or fine glitter when you 'splatter tiny white stars', and then frame or photograph the finished galaxy eye to share on DIY.org.