Primary challenges (ages 5-11)

Typically completed by 5-11 year olds, CREST Star and SuperStar challenges relate to everyday experiences. Children complete eight activities to gain a CREST Award, with each activity taking between 45 minutes and one hour to complete.

The activities are designed to be easy-to-run and low-cost. You don’t need to be a teacher, have a science background or have access to specialist equipment to run them. The packs contain helpful hints and tips for you to use, explaining the scientific themes and offering guidance on conversation topics for your children.

There are more CREST approved resources that have been developed by our partners and providers specific to your region.

To browse the packs, click the buttons below or scroll down.

5 years ago

All SuperStar challenges

  • Text
  • Handson
  • Stem
  • Challenges
  • Discussion
  • Explore
  • Create
  • Experiment
  • Investigate
  • Toothpaste
  • Materials
  • Glue
  • Tomato
  • Yoghurt
  • Superstar
The activities in this pack have been selected from our library of CREST SuperStar challenges. Children need to complete eight challenges to achieve a CREST SuperStar Award. If you want, you can mix and match challenges from different packs, as long as children complete eight SuperStar challenges. This resource is published under an Attribution - non-commercial - no derivatives 4.0 International creative commons licence (


SURPRISING STAINS Surprising Stains Organiser’s Card SURPRISING STAINS About the activity This activity is designed to get children thinking about chemistry. Cosmic and Gem have been picking and eating blackberries and managed to get juice on their white tee shirts. Cosmic puts soap on his, Gem puts lemon juice on hers. Both of the stains changed colour - can the children work out why? Through this activity you will support your group to: • Investigate what caused the colour changes. • Explore different plant materials (food) that change colour. • Group chemicals by colour change and make a chart. Kit list • Blackberries - you do not need a lot of juice (you could use ripe blackcurrants instead) • Saucers or small containers • Spoons • Lemon juice (bottled is fine) • Liquid soap • A selection from lime juice, vinegar, fizzy drinks, apple juice, white grape juice, orange juice, crushed rhubarb, cream of tartar, yoghurt etc. (optional) • A selection from baking soda, mild washing powder, indigestion tablets, milk of magnesia, toothpaste, window cleaner (with ammonia) etc. (optional) • Other dark coloured plants - see the ACTIVITY CARD. What to do 1. Read the ACTIVITY CARD to familiarise yourself with the activity. 2. Check the Kit list and ensure you have the correct resources. 3. Set the scene by discussing the story with the children. 5. Encourage children to talk together to develop their own ideas. 6. Encourage children to follow Frank’s ideas and then to explore their own ideas. 7. Encourage the children to make their own records. This might include creating a poster or chart. 4. Help the children to identify what the problem is.

Things to think about Many of the plants listed in the ACTVITY CARD will change colour. Many red or purple plants will work, but red cabbage is particularly effective. The slightly smelly, but strongly coloured, liquid gives a broad range of colours when various substances are added. Extracting the colour is best done by boiling the cabbage. Encourage children to compare several plants. Keywords • Stains • Colour • Plants • Berries • Acid • Alkali • Chemistry. Watch out! More colour can be extracted from plant material if it is heated. Only allow children to use hot water under supervision. Using warm water helps reduce the safety risks. Do not let children use any substances in the kitchen that may be hazardous such as bleach, washing soda, dishwasher detergent and powerful cleaners. Do not taste anything in this activity. British Science Association Registered Charity No. 212479 and SC039236

Star level

Collections of one hour challenges recommended for children aged 5-7 years that relate to children’s everyday experiences. Find out more about this level and how to gain a CREST Award on the CREST Star page.

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SuperStar level

Collections of one hour challenges recommended for children aged 7-11 years that realate to broader situations that children are likely to have come across. Find out more about this level and how to gain a CREST Award on the CREST SuperStar page.

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