Maths games
Here is a collection of links to free online maths games that will benefit your child. They provide practice at many of the basic concepts involved. The first site is a one stop shop and I highly recommend it. You may find that you love it so much that you never visit the other sites!
http://www.rainforestmaths.com/
http://www.apples4theteacher.com/math.html
http://www.woodlands-junior.kent.sch.uk/maths/index.html
If you want a challenge and enjoy racing games you will love this site. You can play with more than 1 player too!
http://www.arcademicskillbuilders.com/aboutus.htm
Here is another link to a website with times table games.
http://www.bbc.co.uk/skillswise/numbers/wholenumbers/multiplication/timestables/
Click on this link to practice telling the time. You should be able to go to level C (blue) and click on the 4th clock down to find the game that practices 5 minute intervals.
http://www.rainforestmaths.com/
Another great link for tables is http://www.multiplication.com/
This game has more advanced questions, but is lots of fun and may be suitable for older siblings. http://www.sgfl.org.uk/games/games/maths/mathionaire