Here are some websites that you can visit to have fun with numbers:
http://www.ictgames.com/whackAMole/index.html
http://www.ictgames.com/fairyfog_random.html
http://www.ictgames.com/piratenumbers2.html
http://www.ictgames.com/fishy2s.html
http://kinderwebgames.com/one.html
http://www.abc.net.au/countusin/games/game11.htm
http://www.ictgames.com/whackAMole/index.html
http://www.ictgames.com/fairyfog_random.html
http://www.ictgames.com/piratenumbers2.html
http://www.ictgames.com/fishy2s.html
http://kinderwebgames.com/one.html
http://www.abc.net.au/countusin/games/game11.htm