Walk into any art supply aisle and you'll find poster colours and watercolours sitting close together, often leaving parents unsure which one to pick for a school project or a weekend craft session. Both are popular choices for kids, but they behave quite differently on paper, and choosing the right one depends on what the project actually needs. This guide breaks down the difference so you can pick the paint that suits your child's next art activity.
What Are Poster Colours?
Poster colours are thick, opaque paints known for their bold, solid coverage. Once applied, they sit fully on top of the paper without letting the surface show through, which makes them ideal for projects that need bright, flat blocks of colour, like school posters, charts, or labelled diagrams.
Because of their opacity, poster colours are also more forgiving of mistakes, since a lighter colour can often be painted over a darker one without the original layer showing through underneath.
What Are Watercolours?
Watercolours, on the other hand, are translucent paints that blend into the paper rather than sitting on top of it. This creates softer, layered effects, ideal for artistic projects like landscapes, shading exercises, or anything that benefits from a gentle blend of colours rather than solid, flat coverage.
Watercolours require a bit more control, since colours can bleed or blend unintentionally if not applied carefully, making them slightly more suited to children who are a little more comfortable handling a paintbrush.
Poster Colours vs Watercolours: Key Differences
Opacity and Coverage Poster colours provide bold, solid coverage, making mistakes easy to paint over, while watercolours are translucent and better suited for soft, blended effects rather than flat colour blocks.
Ease of Use for Young Children Poster colours are generally easier for younger children to use effectively, since even a simple, uncontrolled brush stroke still results in a clear, visible colour. Watercolours require more precision to achieve a neat result, which can be trickier for very young hands.
Best Suited Projects Poster colours work best for school posters, charts, labelled diagrams, and projects that need bold, readable colour. Watercolours are better suited for artistic paintings, nature scenes, and projects where blending and softness matter more than sharp precision.
Drying Time and Layering Poster colours dry relatively quickly and can be layered without much bleeding, while watercolours often need to dry between layers to avoid unwanted colour mixing on the page.
Cleanup and Mess Poster colours tend to be slightly thicker and can stain clothing or surfaces more noticeably if not cleaned promptly, while watercolours, being more diluted, are generally a bit easier to clean up, especially from hands and brushes.
Which One Should You Choose for Your Child?
Choose Poster Colours If:
Your child is working on a school project like a poster, chart, or labelled diagram
You want a paint that's easier for younger children to use with visible, confident results
The project needs bold, solid colour rather than soft blending
Choose Watercolours If:
Your child is working on a more artistic or creative painting project
You want to encourage gentle blending, shading, and softer colour transitions
Your child is a little older or more comfortable with careful brush control
Safety Considerations for Kids' Paints
Regardless of which type you choose, always check that the paint is labelled non-toxic, especially important since younger children often touch their hands to their face or mouth during art activities. Our DOMS Poster Colour 12 Shades Set is a non-toxic, water-soluble option designed with rich pigmentation and smooth blending, suitable for school assignments as well as creative artwork.
For a broader range of art supplies, including watercolour-friendly tools and creative kits, our art kit collection offers additional options suited to different age groups and project types.
Can You Use Both Together?
Many art projects actually benefit from combining both. Poster colours can be used for bold background shapes or lettering, while watercolours add softer, blended details on top or alongside. Having both types available at home gives kids the flexibility to choose the right technique based on what their specific project or creative mood calls for, rather than being limited to just one style of painting.
Common Mistakes Parents Make When Buying Kids' Paints
A common mistake is buying based purely on packaging appeal rather than checking whether the paint type actually suits the project at hand, like picking watercolours for a bold school poster that really needed solid, opaque coverage instead. Another frequent issue is skipping the non-toxic label check, especially important for younger children who may still put fingers or brushes near their mouth during a painting session.
It also helps to consider the paper being used. Watercolours generally need slightly thicker paper to avoid excessive wrinkling once wet, while poster colours work well on most standard drawing paper without much preparation needed beforehand.
Frequently Asked Questions
1. Which is easier for young children, poster colours or watercolours?
Poster colours are generally easier for younger children, since their opaque coverage produces clear, confident results even with less precise brush control.
2. Are poster colours suitable for detailed school projects?
Yes, poster colours are especially well-suited for posters, charts, and diagrams that need bold, readable colour blocks rather than soft shading.
3. Do watercolours require more skill to use than poster colours?
Yes, watercolours generally require a bit more control and practice to avoid unintentional bleeding or blending between colours.
4. Is it safe to use poster colours for young kids?
Yes, as long as the product is labelled non-toxic, poster colours are generally safe for children, though supervision is still recommended during use.
Final Thoughts
Poster colours and watercolours each serve a different purpose in a child's art activities. Poster colours suit bold, structured school projects, while watercolours are better for gentle, artistic paintings that benefit from blending and softness. Keeping both on hand gives kids the freedom to explore different styles depending on the project.
Explore our DOMS Poster Colour Set and full art kit collection at Gifted Stationery to find the right paints for your child's next creative project.