Boxes which have been wrapped up, even in old brown paper or old birthday/Christmas paper are an excellent resource for maths as they are interesting as well as useful. Balance scales are also very useful for comparing weights. Wrap up some parcels so that they are different sizes and different weights. Take 3 of the parcels and lay them out on the table. Pick up two of the parcels and ask your child which of the two they think is the heavier. Pass the parcels to them one at a time and then ask again which is heavier. Ask them what would happen if the two parcels were put on the balance scales. Measuring weight