Here are three easy downloadable maths scavenger hunts for your children to complete at home. Aimed at KS1 (aged 5-7), they can be used with older Primary children too.
One on shapes, one on making comparisons and one on measurements.
Frugal Fun for Boys & Girls have a range of other activities aimed at Primary children too, including LEGO building ideas, STEM activities, and play ideas for active kids.