Show your child what they would normally have for lunch.

Ask your child to hold a food item in each hand to compare their mass to work out which is the lightest. While they're comparing, help them talk about the mass using words like:

• light, lighter, lightest
• heavy, heavier, heaviest.

Get them to repeat step 2 until they have all the items are ordered from lightest to heaviest.

Ask your child these questions to support their understanding of mass:

• "So the mandarin is lighter than the museli bar? Is it lighter than the saltanas?"
• "Let's do this activity with your toys/books/balls?"
• "Are you surprised that the sandwich is lighter than the yoghurt cup, even though the sandwich is bigger?"