Starfall has lots of numeracy activities.
Kizclub contains plenty of printable numeracy pages.
Gill Education have their Junior Infant Maths Book available online with lots of nice videos.
This app helps children practise writing the numbers.
Maths Week Ireland have some ideas for Maths at Home on their website. Lots of these will be too advanced for our children but there are quite a few that are suitable or could be simplified.