Here are some websites that are really good for ideas of what you can be doing at home.
Hungry Little Minds https://hungrylittleminds.campaign.gov.uk/#resources
Oxford Owl https://home.oxfordowl.co.uk/at-school/reception-at-primary-school/getting-ready-to-start-school/
Communication Trust https://ican.org.uk/i-cans-talking-point/parents/