Free creative maths ideas for all year groups including more maths with Lego, maths in the garden, games and puzzles. Most of the activities you can do without using the computer. Does require subscription using your email address.
Nrich have put together a set of activities for you to try at home. There are three sets one for age 3-5, one for age 5-7 and one for age 7-11. There is also an article you can read if you want on how to best engage your children with these activities.
This site offers a wide range of challenges many of which can done offline, for example, the Monday Maths Fun Day Rainbow Multiples to show support for your community. This site loads best through Google Chrome.
There are 28 activities for pupils ages 4-11, organised into year groups. There are 4 activities per year group. Year 1 pupils can compare toys and plan picnics, Y4 can solve crosswords and cocktail puzzles. National Numeracy Day is 13 May 2020
Solving together are weekly puzzles to solve working alongside your children at home. There is clear guidance and answers for each puzzle, the suggestion being to tackle one activity each week. There is video guidance for parents and also teachers and then the 6 different online puzzles to solve together.